Okay, so far I have all the information I need. The secure drive for the Mac will require the user to have a fairly optimized drive to start off with. Why? Because I've wasted way too much time trying to figure out how to work with the damn extents... I don't have any driver code written yet. The reason for this is that I'm not ready to risk loosing my hard drive until I have two full backups. :-) This is a two part project as you know. The 1st project is a freeware encryption only driver... The 2nd part is an encryption/compression driver. I've written most of the routines for the 2nd project to do the free/full space management and caches. Once I write the freeware program I will have a working driver (I hope) and will be able to implement the compressing driver. I do plan to make some money off of this and give Stacker, X2 and E-disk a bit of competition, so I figure somewhere around the $30-$50 range for the compressing/encrypting driver... I'm going to make the compressing driver have a possibly self-optimizing when idle routine, but I may decide to drop this if it takes too long... Let me know if you have any suggestions/etc. NOTE: DO NOT REPLY TO THIS MESSAGE!!! Send your replies to rarachel@photon.poly.edu. The reason for this is that there's some trouble with Photon right now, and I am using another machine to get my mail :-I Hopefully this will be fixed soon...