[General Questions and Answers] smash_the_stack:
This will take a while

Update on the software update data.

It uses a fat32 USB drive with several folders.

Each folder contains a force_loading.zip and a readme. All except the latest two are identical in size.

None of them are actual zip files. I haven't been able to identify the header signature to anything yet. After writing a quick script to rule out duplicate headers, we get only two unique file headers.

<pre>######./CL-MH17N1AX/force_loading.zip########
00000000 53 45 43 5f 50 53 56 4c 60 37 21 3d 00 00 00 00 |SEC_PSVL`7!=....|
00000010 80 35 21 3d 00 00 00 00 00 01 01 00 61 6c 6c 2e |.5!=........all.|
00000020 69 6d 67 20 20 20 20 20 20 20 20 20 20 20 20 20 |img |
00000030 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
*
00000050 28 0c 5e f4 c3 6d 1b e8 a2 05 f1 85 85 a2 94 cc |(.^..m..........|
00000060 36 f7 11 1e 39 53 83 2c ea 9a a7 c4 d4 e0 46 a2 |6...9S.,......F.|
00000070 9c a0 b2 5b ad 55 0e d2 27 8b 1d d4 df e8 a9 97 |...[.U..&apos;.......|
00000080 0f e1 20 62 ae 43 fd 3e e5 18 d5 88 bb b2 e7 e6 |.. b.C.>........|
00000090 98 8e fd c5 5a ab cc 58 6f 06 cc 78 b1 cc 75 5c |....Z..Xo..x..u\|
######./CL-MHL8N1MX/force_loading.zip########
00000000 53 45 43 5f 50 53 56 4c f0 19 21 3d 00 00 00 00 |SEC_PSVL..!=....|
00000010 10 18 21 3d 00 00 00 00 00 01 01 00 61 6c 6c 2e |..!=........all.|
00000020 69 6d 67 20 20 20 20 20 20 20 20 20 20 20 20 20 |img |
00000030 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
*
00000050 36 22 5a a0 7d 9f c5 51 65 2a 0f 6e 60 b9 ed 12 |6"Z.}..Qe*.n`...|
00000060 31 dc cf 32 38 6b f5 37 a8 a9 de 11 1e 3f ce ac |1..28k.7.....?..|
00000070 f3 cd 69 0a 41 1e 5a c2 61 8c b8 7f 08 89 87 c3 |..i.A.Z.a.......|
00000080 77 d6 40 78 ff de 44 5d 33 16 fd 4b 52 6c 75 48 |w.@x..D]3..KRluH|
00000090 81 04 2c b8 f7 45 3b d6 a6 15 05 10 89 cc 5a 98 |..,..E;.......Z.|
</pre>

Every readme indicates a v4p file inside of the corresponding zip.

<pre>######./CL-MH17N1AX/readme.txt########
Contents of force_loading.zip
SoC : 18AA-1945-001
SoC VP : CL-MH17N1AX
VR-TTS : (not included)
.v4p : SetID500_reflash_0404_011D_30821301.v4p
######./CL-MH17N2AX/readme.txt########
Contents of force_loading.zip
SoC : 18AA-1945-001
SoC VP : CL-MH17N2AX
VR-TTS : (not included)
.v4p : SetID500_reflash_0404_021D_30821301.v4p
######./CL-MH17N3AX/readme.txt########
Contents of force_loading.zip
SoC : 18AA-1945-001
SoC VP : CL-MH17N3AX
VR-TTS : (not included)
.v4p : SetID500_reflash_0404_051D_30821301.v4p
######./CL-MH17N4AX/readme.txt########
Contents of force_loading.zip
SoC : 18AA-1945-001
SoC VP : CL-MH17N4AX
VR-TTS : (not included)
.v4p : SetID500_reflash_0404_061D_30821301.v4p
######./CL-MH17N5AX/readme.txt########
Contents of force_loading.zip
SoC : 18AA-1945-001
SoC VP : CL-MH17N5AX
VR-TTS : (not included)
.v4p : SetID500_reflash_0404_041D_30821301.v4p
######./CL-MH17NDAX/readme.txt########
Contents of force_loading.zip
SoC : 18AA-1945-001
SoC VP : CL-MH17NDAX
VR-TTS : (not included)
.v4p : SetID500_reflash_0404_121D_30821301.v4p
######./CL-MH17NFAX/readme.txt########
Contents of force_loading.zip
SoC : 18AA-1945-001
SoC VP : CL-MH17NFAX
VR-TTS : (not included)
.v4p : SetID500_reflash_0404_131D_30821301.v4p
######./CL-MH17NGAX/readme.txt########
Contents of force_loading.zip
SoC : 18AA-1945-001
SoC VP : CL-MH17NGAX
VR-TTS : (not included)
.v4p : SetID500_reflash_0404_351D_30821301.v4p
######./CL-MH17NHAX/readme.txt########
Contents of force_loading.zip
SoC : 18AA-1945-001
SoC VP : CL-MH17NHAX
VR-TTS : (not included)
.v4p : SetID500_reflash_0404_141D_30821301.v4p
######./CL-MH17NJAX/readme.txt########
Contents of force_loading.zip
SoC : 18AA-1945-001
SoC VP : CL-MH17NJAX
VR-TTS : (not included)
.v4p : SetID500_reflash_0404_151D_30821301.v4p
######./CL-MHL8N1MX/readme.txt########
Contents of force_loading.zip
SoC : 18AE-1945-001
SoC VP : CL-MHL8N1MX
VR-TTS : (not included)
.v4p : SetID500_reflash_0404_431D_30821301.v4p
######./CL-MHL8N4MX/readme.txt########
Contents of force_loading.zip
SoC : 18AE-1945-001
SoC VP : CL-MHL8N4MX
VR-TTS : (not included)
.v4p : SetID500_reflash_0404_451D_30821301.v4p
</pre>

And that's all the progress I've made so far.