The problem with this is how FMCB works. Because the files on the MC are organized as "Savegames" they can be deleted easily with the regular internal MC-Browser. Only a hardware read-only switch could prevent the user from deleting files of his MC, but I don't know any MC which features this.
Originally Posted by NeverGoingBack
Slim PS2 SCPH-70004 (v13) w/ FMCB, 3x Sony 8MB, 1x MaxMemory 16MB (Backup card)
I'm not available for FMCB installation service until I can guarantee a processing time of a few days again, sorry.