This is on a brand new Dell Inspiron running Windows 7 Home Pro 64bit. I use Norton Ghost to make a computer backup to an external MyBook drive and then have set the Offsite Copy to a Dell RD1000. The backup itself doesn't take an enormous amount of time but when it makes the Offsite Copy (about 46gb) it gets extremely slow. I actually haven't let it complete since it said it was going to take 23 hours to complete. I then tried just copying it from the MyBook to the RD1000 and ran into the same situation. I left it on overnight and after ten hours, it reported it was about 10% done. On my previous computer, a Dell Optiplex GX260 using Windows XP Pro, I never had an issue with this so I just don't know if it's a Windows 7 problem (although looking up compatibility, the RD1000 is supposed to completely compatible with Win7 32/64) or an RD1000 problem or what.