On my Acekard RPG they vary from 175 bytes to 1/2 a meg...
Code:
J:\Games\M to Z>dir *.sav
Directory of J:\Games\M to Z
*snip*
08/08/2008ÂÂ02:59 PMÂÂÂÂÂÂÂÂÂÂ 524,288
08/04/2008ÂÂ08:12 PMÂÂÂÂÂÂÂÂÂÂÂÂÂÂ 175
08/19/2008ÂÂ03:36 PMÂÂÂÂÂÂÂÂÂÂÂÂÂÂ 512
*snip*
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂ32 File(s)ÂÂÂÂ 12,292,143 bytes
In the Rom Info menu there is an option to set the save size to: Auto, (or if not auto detected) 4k, 64k, 512k, 2M, 4M, 8M, 16M, 32M, 64M, 128M
Pretty easy to see, just use window search in your SD card for *.sav, or goto a cmd prompt and type X:, then dir /s *.sav, where X is the drive letter of your SD
There are items you can remove to save some space, in Acekard and R4, remove all the themes you aint using
In Acekard, you can remove all folders but your language in the language folder (lang_en is english)
Also use a rom trimmer, this can save a TON of space on the SD
I also bought a Supercard SD to move all my gba, gbc, and nes roms to, that's 2gb of storage for those