requesttype=0x0d

This seems to be similar to the command 0x09 in the older protocol, but note that the device name has no trailing backslash.

Command: variable length (here 0x53 bytes)

00000000  13 00 00 00 01 02 00 00 00 00 00 00 00 00 00 00  ................
00000010  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00000020  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00000030  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00000040  02 00 00 00 0d 00 10 11 13 00 00 00 a8 d9 12 00  ................
00000050  41 3a 00                                         A:.
      

Argument: null-terminated string containing the name of the disk.

Response: 0x5c bytes

00000000  1c 00 00 00 01 03 00 00 00 00 00 00 00 00 00 00  ................
00000010  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00000020  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00000030  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00000000  02 00 00 00 0d 00 10 21 1c 00 00 00 a8 d9 12 00  .......!........
00000010  00 00 00 00 c0 44 0f 00 80 ac 0e 00              .....D......
      

So this camera seems to have a card with 1,000,640 bytes, and 961,664 bytes free. I would guess that we need to multiply by, say, 1024, since I think the card was 1GB.