An unmodded xbox doesm't have ftp access. Evox, unleashX, ava, etc all provide ftp access. You need a chip/tsop or softmod. Or, if it's purely gamesaves you want, a gamesave exploit (007/Splinter Cell/Mechassault) would work fine without modding your xbox.
If none of the above, then it's mem cards, which can only copy so much (no kotor/NG/etc.)