I've installed Acronis True Image Workstation 9.1 (build 3.694). When I try to backup to my Iomega REV drive, I get this error: "00040010: Het apparaat is bezet" -> translation: "Device is busy". In Windows Explorer, I can drag and drop files to my REV drive without any problems. I think a REV drive acts like a CD-drive which is UDF formatted (Iomega has a driver for that). EDIT: When I uninstall the "Iomega REV System Software", I get the error: Disk is full. When I choose "Format", I get the error: Access Denied. Isn't it possible to disable the UDF function of Acronis TIW and just use the Iomega driver (so that I can drag and drop files to my disk)?