Hello, I have been using Time Machine for backups of my iMac for a few years now without problems. Recently, I bought a new and bigger external hard drive for my backups. It's a Samsung G2 Portable 500GB. Browsing the Samsung with Finder, it shows that all backups are made correctly. However, in Time Machine, none of these backups are visible. Also, in System Preferences, under Time Machine, the disk that is shown is my iMac drive, not the Samsung. Going to Select Disk to choose the Samsung drive, does not help. Although, the Samsung is shown, the iMac drive remains to be shown as the Time Machine drive, even after selecting the Samsung. Does anybody know this problem? Thanks in advance for any suggestion! Arnoud ___________________ iMac7.1 Intel Core 2 Duo, 2.4GHz, 2GB, Mac OS X 10.6.7, External hard drive: Samsung G2 Portable 500GB.