If you really want to use an old PB be sure to check our Wiki for SCSI hard disk replacement options. My personal experience with CF and PATA storage adaptors from the Japanese dealer Artmix are very well (aside the fact that you flatten a hundred USD for each one, without storage media). I prefer the CF to SCSI adaptor card, as this will provide a very quiet and sufficiently fast storage module. You could even think of making a hardware hack using two CF adaptor boards, one with an external accessible slot for a removable CF or SD card }