i set up a d-link dns-321 in raid 1 for a small office. they have 3 computers, 2 are xp, and one vista. the reason was that one of the xp computers had a drive failure resulting in loss of most important data. the most important programs are 2020 kitchen design and quickbooks. for 2020, i put all the remaining drawing files from the other two computers so that the entire network has access to them. saving is no problem, but opening is. when i try to open a drawing file from the NAS, the program crashes. the only way to open such file is to drag and drop it to the desktop. i would like to find out if there is a program that i can install on all 3 computers, to automatically back up or sync their individual design folders with the drawings to the NAS. second is quickbooks. i know i can back up quickbooks to the nas using the built in quickbooks options. for now, quickbooks company file is installed on the vista machine, and shared to with the XPs. but i would like to move it to the nas. when i do, i get errors that the company file cannot be opened because the host machine is missing software... any input on my problems would be appreciated.