Hi guys, total mac newbie here. A friend gave me a dead macbook air first generation A1237, which I have fixed and it's running nicely. I'm on day 3 with it. I am intending to bootcamp Win XP as I need to use Corel Draw. That is not my problem: I've got all the guides for doing this and I am confident. My problem is that I am trying to do a Time Machine backup before I start because I don't have the OS disks or the installer for iWork '09 that are on the machine. I am trying to back up to an external USB SATA drive, and I have tried two different drives from different manufacturers (although both in the same type of usb/sata converter) and I get the same failure. Sometimes this is around 120MB in to the backup, twice it has got to nearly 2GB before failing. The pop-up I get on fail is "The backup was not performed because an error occurred while copying files to the backup disk". The disks are formatted with the mac journaled file system, and are otherwise readable. They check out ok in diskutil verify. Looking in Console and filtering for string backupd gives errors like: 27/06/2013 08:59:27 com.apple.backupd Error: (-36) SrcErr:YES Copying /Library/Application Support/Apple/Mail/Stationery/Apple/Contents/Resources/Announcements/Contents/Resources/Baby.mailstationery/Contents/Resources/bg_pattern.jpg to (null) 27/06/2013 08:59:37 com.apple.backupd Error: (-36) SrcErr:YES Copying /Library/Application Support/Apple/Mail/Stationery/Apple/Contents/Resources/Announcements/Contents/Resources/Picnic.mailstationery/Contents/Resources/napkin.jpg to (null) 27/06/2013 08:59:44 com.apple.backupd Stopping backup. I have tried deleting the timemachine backup from the disk and starting again, and the result is the same. The machine is running 10.6.8 Snow Leopard. I am running as an administrator, the machine is on mains power, and is set to not sleep. Any help appreciated.