EXHIBIT 10.7

THE SECURITIES  REPRESENTED BY THIS  CERTIFICATE  AND THE SHARES OF COMMON STOCK
PURCHASABLE HEREUNDER HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933,
AS AMENDED (THE "ACT"),  OR UNDER ANY STATE SECURITIES LAWS, AND THE COMPANY HAS
RELIED UPON AN EXEMPTION TO THE REGISTRATION  REQUIREMENT  UNDER THE ACT FOR THE
SALE OF THE SECURITIES REPRESENTED BY THIS CERTIFICATE TO ITS HOLDER. THEREFORE,
THE SECURITIES  REPRESENTED BY THIS  CERTIFICATE  AND THE SHARES OF COMMON STOCK
PURCHASABLE  HEREUNDER  ARE  RESTRICTED  SECURITIES  AND  MAY  NOT  BE  SOLD  OR
TRANSFERRED TO ANY THIRD PARTY WITHOUT EITHER BEING  REGISTERED UNDER THE ACT OR
UPON  RECEIPT  OF  AN  OPINION  OF  COUNSEL   ACCEPTABLE  TO  THE  COMPANY  THAT
REGISTRATION IS NOT REQUIRED UNDER THE ACT.

DATED: May 16, 2001                                                       NO. 57


                                     WARRANT

                            nSTOR TECHNOLOGIES, INC.

                        Warrant to Purchase 50,000 Shares

                          of Common Stock, par value $.05 per share

                   VOID AFTER 5:00 P.M., EASTERN STANDARD TIME

                                       ON JUNE 30, 2004


        This certifies  that,  for value  received,  H. Irwin Levy ("Levy"),  or
registered  assigns  (collectively  with Levy,  the  "Holder"),  is  entitled to
purchase from nStor Technologies,  Inc., a Delaware corporation (the "Company"),
Fifty Thousand  (50,000) fully paid and  nonassessable  shares (the "Shares") of
the Common Stock, par value $.05 per share, of the Company ("Common Stock") at a
price equal to $.75 per share (which represents the closing market price for one
share of the Common  Stock on May 16, 2001) (the  "Exercise  Price") at any time
and from time to time from and after the date hereof to and including 5:00 p.m.,
Eastern Standard Time on June 30, 2004 (the "Exercise  Period"),  subject to the
terms, conditions and adjustments set forth in this Warrant.


<PAGE> 2

        1. Exercise of Warrants.

(a) This Warrant may be  exercised in whole or in part by the Holder  during the
Exercise  Period upon  presentation  and  surrender  hereof,  with the  attached
Purchase Form duly executed, at the office of the Company located at 100 Century
Boulevard,  West  Palm  Beach,  FL 33417,  accompanied  by full  payment  of the
Exercise Price multiplied by the number of Shares of the Company being purchased
(the "Purchase Price"), whereupon the Company shall cause the appropriate number
of  Shares  to be issued  and  shall  deliver  to the  Holder,  as  promptly  as
practicable, a certificate representing the Shares being purchased. This Warrant
may be exercised for not less than 1,000 Shares and in additional  increments of
1,000 Shares at any time and from time to time during the Exercise Period.  Upon
each partial  exercise  hereof,  a new warrant  evidencing  the remainder of the
Shares  will be issued  to the  Holder,  at the  Company's  expense,  as soon as
reasonably  practicable,  at the same  Exercise  Price,  for the  same  Exercise
Period, and otherwise of like tenor as the Warrant partially exercised.

(b) Payment of the Purchase Price may be made as follows (or by any  combination
of the  following):  (i) in United  States  currency  by cash or  delivery  of a
certified or bank  cashier's  check  payable to the order of the Company,  or by
wire transfer of immediately available funds to an account designated in writing
by the Company,  in the amount of the Purchase  Price,  (ii) by surrender to the
Company of this  Warrant in  exchange  for the number of shares of Common  Stock
equal to the product of (x) the number of shares to which this  Warrant is being
exercised  multiplied  by (y) a fraction,  the numerator of which is the Current
Market Price (as defined  below) of the Common Stock less the Exercise Price and
the  denominator of which is the Current Market Price,  or (iii) by surrender to
the Company for cancellation of that portion of the 10% Subordinated  Promissory
Note of even date  herewith  issued to the  Holder by the  Company  equal to the
Purchase  Price.  The  term  "Current  Market  Price"  shall  mean,  on any date
specified  herein,  the amount per share of the Common  Stock,  equal to (i) the
last reported sale price of such Common Stock,  on such date or, in case no such
sale takes place on such date,  the average of the closing bid and asked  prices
thereof on such date,  in either case as  officially  reported on the  principal
national  securities  exchange  on which  such  Common  Stock is then  listed or
admitted for  trading,  (ii) if such Common Stock is not then listed or admitted
for trading on any national  securities exchange but is designated as a national
market  system  security by the NASD,  the last  reported  trading  price of the
Common  Stock on such  date,  (iii) if there  shall have been no trading on such
date or if the Common Stock is not so designated, the average of the closing bid
and asked prices of the Common Stock on such date as shown by the NASD automated
quotation  system,  or (iv) if such Common  Stock is not then listed or admitted
for trading on any national exchange or quoted in the  over-the-counter  market,
the fair value  thereof  (as of a date which is within 20 days of the date as of
which  the  determination  is  to  be  made)  determined  in  good  faith  by an
independent  investment  banking  firm  selected  jointly by the Company and the
Holder or, if that  selection  cannot be made within ten days, by an independent
investment  banking firm  selected by the American  Arbitration  Association  in
accordance with its rules, and provided further,  that the Company shall pay all
of the fees and  expenses  of any third  parties  incurred  in  connection  with
determining the Current Market Price.


<PAGE> 3


(c) The Holder  shall be deemed for all  purposes  to have  become the holder of
record of the Shares so purchased  upon exercise of this Warrant as of the close
of business on the date as of which this Warrant,  together with a duly executed
Purchase  Form,  was delivered to the Company and payment of the Purchase  Price
was made  (the  "Exercise  Date"),  regardless  of the date of  delivery  of any
certificate  representing  the Shares so  purchased,  except that if the Company
were subject to any legal  requirements  prohibiting  it from issuing  shares of
Common Stock on such date,  the Holder shall be deemed to have become the record
holder of such Shares on the next succeeding date as of which the Company ceased
to be so prohibited.

        2. Exchange;  Restrictions  on Transfer or  Assignment.  This Warrant is
exchangeable,  without  expense,  at the option of the  Holder,  upon  surrender
hereof  to  the  Company  for  other   warrants  of  like  tenor  of   different
denominations  entitling the Holder to purchase in the aggregate the same number
of Shares  purchasable  hereunder.  Subject to  compliance  with Section 5, this
Warrant and all rights hereunder are transferable,  in whole or in part, without
charge to the Holder,  upon  surrender of this Warrant with an  assignment  form
attached  hereto  duly  completed  and  executed  (with  signature  guaranteed),
whereupon  the  Company,  if it  determines  that  the  proposed  assignment  is
permitted  pursuant to the provisions  hereof,  shall register the assignment of
this Warrant in accordance with the information contained in the assignment form
and shall  execute  and  deliver a new  warrant or  warrants  in the name of the
assignee or assignees named in such  assignment form (and, if applicable,  a new
warrant  in the name of the  Holder  evidencing  any  remaining  portion  of the
Warrant not theretofore transferred or assigned) and this Warrant shall promptly
be canceled.  Conditions to the transfer of this Warrant or any portion  thereof
shall be that the proposed  transferee deliver to the Company his or its written
agreement  to accept  and be bound by all of the terms  and  conditions  of this
Warrant.

        3. Rights and  Obligations  of Warrant  Holders.  This  Warrant does not
confer upon the Holder any rights as a shareholder of the Company, either at law
or in equity. The rights of the Holder are limited to those expressed herein and
the Holder, by acceptance  hereof,  consents to and agrees to be bound by and to
comply with all the  provisions of this Warrant.  Each Holder,  by acceptance of
this Warrant, agrees that the Company and its transfer agent, if any, may, prior
to any presentation of this Warrant for registration of transfer, deem and treat
the person in whose name this Warrant is registered  as the  absolute,  true and
lawful owner of this Warrant for all purposes whatsoever and neither the Company
nor any transfer agent shall be affected by any notice to the contrary.


<PAGE> 4


        4.  Covenants and Warranties of the Company.  The Company  covenants and
agrees that:  (i) all Shares which may be issued and delivered  upon exercise of
this  Warrant and payment of the Purchase  Price will,  upon  delivery,  be duly
authorized, validly issued, fully-paid and nonassessable shares of Common Stock;
and (ii) the Company shall at all times during the Exercise  Period  reserve and
keep  available  a number of  authorized  but  unissued  shares of Common  Stock
sufficient to permit the exercise in full of this Warrant. The Company will take
all such  actions as may be  necessary to assure that all shares of Common Stock
may be so issued  without  violation  by the  Company of any  applicable  law or
government  regulation or any requirement of any securities  exchange upon which
shares of Common Stock may be listed  (except for  official  notice of issuance,
which the Company will transmit  promptly  upon  issuance of such  shares).  The
Company  will at no time  close its  shareholder  books or records in any manner
which interferes with the timely exercise of this Warrant.

        The  Company  represents  and  warrants  that:  (i)  the  Company  is  a
corporation duly organized, validly existing and in good standing under the laws
of the state of Delaware; (ii) the Company has all requisite corporate power and
authority to issue this Warrant and to consummate the transactions  contemplated
hereby,  and such issuance and consummation  will not conflict with, result in a
material breach of, constitute a material default under or material violation of
any provision of the Company's  Certificate of Incorporation  or Bylaws,  and to
the best  knowledge of the Company,  any law or regulation  of any  governmental
authority or any provision of any  agreement,  judgment or decree  affecting the
Company;  and (iii) all corporate  action required to be taken by the Company in
connection  with the execution and delivery of this Warrant and the  performance
of the Company's obligations hereunder has been taken.

        5.  Disposition  of Warrants  or Shares.  The Holder  acknowledges  that
neither  this  Warrant  nor the  Shares  have been  registered  under the Act or
applicable state law. The Holder agrees, by acceptance of this Warrant, (i) that
no sale,  transfer or  distribution  of this Warrant or the Shares shall be made
except in  compliance  with the Act and the rules  and  regulations  promulgated
thereunder,  including any applicable  prospectus delivery  requirements and the
restrictions on transfer set forth herein, and (ii) that if distribution of this
Warrant  or any Shares is  proposed  to be made by him or it  otherwise  than by
delivery of a prospectus meeting the requirements of Section 10 of the Act, such
action  shall be taken only  after  submission  to the  Company of an opinion of
counsel, reasonably satisfactory in form and substance to the Company's counsel,
to the effect that the proposed distribution will not be in violation of the Act
or applicable state law.

        6. Adjustment.  The number of Shares  purchasable upon  the  exercise of
this Warrant and the Exercise Price are subject to adjustment  from time to time
as provided in this Section 6.


<PAGE> 5

               (a) Subdivision or Combination of Shares. If the Company shall at
any time subdivide its outstanding  shares of Common Stock into a greater number
of shares  (including a stock split effected as a stock dividend) or combine its
outstanding shares of Common Stock into a lesser number of shares, the number of
Shares  issuable  upon exercise of this Warrant shall be adjusted to such number
as is obtained by  multiplying  the number of Shares  issuable  upon exercise of
this Warrant immediately prior to such subdivision or combination by a fraction,
the  numerator  of which is the  aggregate  number of  shares  of  Common  Stock
outstanding  immediately  after giving effect to such subdivision or combination
and the  denominator of which is the aggregate  number of shares of Common Stock
outstanding  immediately  prior  to such  subdivision  or  combination,  and the
Exercise Price shall be  correspondingly  adjusted to such amount as shall, when
multiplied  by the number of Shares  issuable upon full exercise of this Warrant
(as  increased  or  decreased  to reflect such  subdivision  or  combination  of
outstanding  shares of Common Stock,  as the case may be),  equal the product of
the  Exercise  Price  in  effect   immediately  prior  to  such  subdivision  or
combination  multiplied  by the number of Shares  issuable upon full exercise of
this Warrant immediately prior to such subdivision or combination.

               (b)  Effect of Sale,  Merger  or  Consolidation.  If any  capital
reorganization  or  reclassification  of the capital  stock of the  Company,  or
consolidation or merger of the Company with another corporation,  or sale of all
or  substantially  all of the Company's assets to another  corporation  shall be
effected  after the date hereof in such a way that holders of Common Stock shall
be  entitled  to  receive  stock,  securities  or assets  with  respect to or in
exchange  for  Common  Stock,  then,  as a  condition  of  such  reorganization,
reclassification,  consolidation,  merger or sale, lawful and adequate provision
shall be made whereby the Holder shall thereafter have the right to purchase and
receive,  upon the basis and the terms and conditions  specified in this Warrant
and in lieu of the Shares  immediately  theretofore  purchasable  and receivable
upon the exercise of this Warrant, such shares of stock, securities or assets as
may be  issued  or  payable  with  respect  to or in  exchange  for a number  of
outstanding shares of Common Stock equal to the number of shares of Common Stock
immediately  theretofore  purchasable  and receivable  upon the exercise of this
Warrant,  and in any such case appropriate  provision shall be made with respect
to the rights and interests of the Holder to the end that the provisions of this
Warrant  (including,  without  limitation,  provisions  for  adjustments  of the
Exercise  Price and of the number of Shares  issuable  upon the exercise of this
Warrant)  shall  thereafter  be  applicable,  as nearly as may be  possible,  in
relation to any shares of stock,  securities  or assets  thereafter  deliverable
upon the  exercise  of this  Warrant.  The  Company  shall not  effect  any such
consolidation,  merger  or sale  unless  prior  to or  simultaneously  with  the
consummation  thereof  the  successor  corporation  (if other than the  Company)
resulting from such  consolidation or merger or the corporation  purchasing such
assets shall assume, by written instrument  executed and delivered to the Holder
at its last address  appearing on the books of the Company,  the  obligation  to
deliver  to the  Holder  such  shares of  stock,  securities  or  assets  as, in
accordance with the foregoing sentence, the Holder may be entitled to purchase.


<PAGE> 6


               (c) Notice to Holder of Adjustment. Whenever the number of Shares
purchasable  upon exercise of this Warrant or the Exercise  Price is adjusted as
herein  provided,  the  Company  shall  cause to be  mailed  to the  Holder,  in
accordance  with the  provisions of Section 9 hereof,  notice  setting forth the
adjusted number of Shares  purchasable  upon the exercise of the Warrant and the
adjusted  Exercise Price and showing in reasonable detail the computation of the
adjustment and the facts upon which such adjustment is based.

               (d) Notices to Holder of Certain Events. If at any time after the
date hereof:

                      (i)    the Company  shall  declare  any  dividend or other
                             distribution  upon or with  respect  to the  Common
                             Stock  payable  otherwise  than in cash  out of the
                             consolidated  net  income  of the  Company  and any
                             subsidiaries   thereof,   including   any  dividend
                             payable   in  shares  of  Common   Stock  or  other
                             securities of the Company; or

                      (ii)   the  Company  shall offer for  subscription  to the
                             holders of its Common Stock any  additional  shares
                             of  stock  of any  class  or any  other  securities
                             convertible  into stock or any rights to  subscribe
                             thereto; or

                      (iii)  there  shall  be  any  capital   reorganization  or
                             reclassification   of  the  capital  stock  of  the
                             Company (other than a change in par value,  or from
                             par value to no par value,  or from no par value to
                             par  value  or as  result  of  the  subdivision  or
                             combination  of shares),  or any  conversion of the
                             Shares into securities of another corporation, or a
                             sale of all or  substantially  all of the assets of
                             the Company,  or a  consolidation  or merger of the
                             Company  with  another  corporation  (other  than a
                             merger  with a  subsidiary  in which the Company is
                             the  continuing  corporation  and  which  does  not
                             result  in any  reclassification  or  change of the
                             Shares issuable upon exercise of the Warrants); or

                      (iv)   there   shall  be  a   voluntary   or   involuntary
                             dissolution,  liquidation  or  winding  up  of  the
                             Company;

then, in any one or more of said cases,  the Company shall cause to be mailed to
the Holder, not less than ten (10) days before any record date or other date set
for the  definitive  action,  written notice of the date upon which the books of
the  Company  shall  close or a  record  shall be  taken  for  purposes  of such
dividend, distribution or subscription rights or upon which such reorganization,
reclassification,   conversion,   sale,  consolidation,   merger,   dissolution,
liquidation  or winding up shall take  place,  as the case may be.  Such  notice
shall also set forth facts as shall  indicate  the effect of such action (to the
extent  such  effect  may be known at the date of such  notice) on the number of
Shares and the kind and amount of the shares of stock and other  securities  and
property  deliverable  upon  exercise of the  Warrants.  Such notice  shall also
specify the date as of which the holders of record of the shares of Common Stock
shall participate in said dividend, distribution or subscription rights or shall
be entitled to exchange  their  shares of Common Stock for  securities  or other
property  deliverable upon such  reorganization,  reclassification,  conversion,
sale, consolidation, merger, dissolution, liquidation or winding up, as the case
may be (on which  date in the event of  voluntary  or  involuntary  dissolution,
liquidation  or winding up of the  Company,  the right to exercise  the Warrants
shall terminate).


<PAGE> 7


               (e) Fractional Shares. The Company shall not be required to issue
any  fraction of a Share upon the exercise of this  Warrant.  The number of full
Shares which shall be issuable upon the full or partial exercise of this Warrant
shall be  computed  on the basis of the  aggregate  number of Shares as to which
this Warrant is being exercised.  In lieu of any fractional  interest in a Share
otherwise deliverable upon the exercise of this Warrant, the Company shall pay a
cash  adjustment  (which may be effected as a reduction of the amount to be paid
by the Holder upon such  exercise) in respect of such  fraction of a Share in an
amount equal to the same fraction multiplied by the Current Market Price.

               (f) No Other  Adjustments.  No adjustment to the number of Shares
subject to this  Warrant or the  Exercise  Price shall be made  pursuant to this
Section 6 except as expressly provided herein.

        7. Registration  Rights Agreement.  The Shares issuable upon exercise of
this Warrant shall constitute Registrable Securities (as such term is defined in
that certain  Registration  Rights  Agreement dated as of the date hereof by and
between the Company and the initial  Holder of this Warrant  (the  "Registration
Rights  Agreement")).  Each  Holder of this  Warrant is  entitled  to all of the
benefits  afforded  to a holder  of any such  Registrable  Securities  under the
Registration  Rights  Agreement  and  such  Holder,  by its  acceptance  of this
Warrant,  agrees to be bound by and comply with the terms and  conditions of the
Registration  Rights  Agreement  applicable  to such  Holder as a holder of such
Registrable Securities.

        8. Survival. The various rights and obligations of the Holder and of the
Company as set forth in Sections 3, 4, and 5 hereof  shall  survive the exercise
of this Warrant and the surrender of this instrument upon such exercise.

        9. Notice.  All notices  required by this Warrant to be given or made by
the  Company  shall  be  given or made by first  class  mail,  postage  prepaid,
addressed to the registered holder hereof at the address of such holder as shown
on the books of the Company.

        10.  Loss  or   Destruction.   Upon   receipt  of  evidence   reasonably
satisfactory  to the Company of the loss,  theft,  destruction  or mutilation of
this Warrant and, in the case of any loss,  theft or destruction,  upon delivery
of an  indemnity  agreement  reasonably  satisfactory  in form and amount to the
Company and its counsel, or, in the case of any such mutilation,  upon surrender
and cancellation of this Warrant, the Company, at its expense,  will execute and
deliver, in lieu thereof, a new Warrant of like tenor.


<PAGE> 8


        11.    Miscellaneous.

               (a)  Neither  this  Warrant  nor any term  hereof may be changed,
waived,  discharged or terminated except by a written instrument executed by the
Company and the Holder.

               (b) This Warrant shall be governed by, and construed and enforced
in accordance  with, the internal laws of the State of Delaware,  without regard
to principles of conflicts of laws thereof.

               (c) Each provision of this Warrant shall be interpreted in such a
manner as to be effective,  valid and enforceable  under  applicable law, but if
any  provision of this Warrant is held to be invalid,  illegal or  unenforceable
under any  applicable  law or rule in any  jurisdiction,  such provision will be
ineffective   only  to  the   extent   of   such   invalidity,   illegality   or
unenforceability  in such  jurisdiction,  without  invalidating the remainder of
this  Warrant  in  such  jurisdiction  or any  provision  hereof  in  any  other
jurisdiction.

               (d) No course of  dealing or delay or  failure  to  exercise  any
right  hereunder  on the part of the  Holder  shall  operate as a waiver of such
right or otherwise prejudice the Holder's rights, power or remedies.

               (e)  The  Company  shall  pay  all  expenses  incurred  by  it in
connection  with,  and all  documentary  stamp and other taxes (other than stock
transfer  taxes) and other  governmental  charges that may be imposed in respect
of, the issue,  sale and delivery of this Warrant and the Shares  issuable  upon
the exercise hereof.

               (f) This Warrant and the rights  evidenced  hereby shall inure to
the benefit of and be binding upon the successors and assigns of the Company and
the successors and permitted assigns of the Holder.

                      [SIGNATURES APPEAR ON FOLLOWING PAGE]


<PAGE> 9


        IN WITNESS WHEREOF the Company has caused this Warrant to be executed by
its duly authorized officer as of the ___ day of May, 2001.

ATTEST:                                        nSTOR TECHNOLOGIES, INC.

By: /s/ Monica D. Wells                           By: /s/ Jack Jaiven
   --------------------                          ------------------------
Name: Monica D. Wells                            Jack Jaiven
     ------------------
Title:                                           Vice President
     ------------------


<PAGE> 10


                                   ASSIGNMENT

        To be executed by the registered  holder to effect a permitted  transfer
of the within Warrant. Capitalized terms have the same meanings ascribed to them
in the within Warrant.

FOR VALUE RECEIVED_____________________________ ("Assignor") hereby sells,
assigns and transfers unto

________________________________("Assignee")
(Name)


(Address)


the right to purchase  __________ shares of Common Stock of nStor  Technologies,
Inc.  evidenced  by the  within  Warrant,  together  with all  right,  title and
interest    therein,    and   does    irrevocably    constitute    and   appoint
_____________________________  attorney to transfer  the said right on the books
of said corporation with full power of substitution in the premises.

Date:_________________________        Assignor:

                                      By:
                                      Its:

                                      Signature:
                                                ----------------------------


<PAGE> 11


                                  PURCHASE FORM

        To be executed upon exercise of the within  Warrant.  Capitalized  terms
have the same meanings ascribed to them in the within Warrant.

To:  nStor Technologies, Inc.

        The  undersigned  hereby  exercises the right to purchase  _____________
Shares of Common Stock evidenced by the within  Warrant,  according to the terms
and  conditions  thereof,  and hereby makes payment of the Purchase  Price.  The
undersigned  requests  that  certificates  for the Shares shall be issued in the
name set forth below:

Dated:                              Name:__________________________________

                                         ----------------------------------
                                         (Address)

                                         ----------------------------------

                                         Social Security No.___________________
                                         or other identifying number