Yes, you can buy a floppy drive with a USB connector. We'll be glad to help you making these decisions. You may have an old external SCSI drive.
Most new computers come without a SCSI connector.
If you are desperate to use these old devices you have two choices. The best is probably a small adaptor from USB to SCSI that will work on all of Apple's new computers. Internal Hard Drives Most new tower computers come with a single hard drive that is no longer a SCSI drive. There is enough space in most towers to add about five additional hard drives. The average user may want to add a second drive.