I own a uMBP late 09 running 10.6.2. Recently, i bought a Seagate FreeAgent Go 320Gb to use as back-up for both Mac and Windows. I partitioned it into equal HFS+ and FAT32, the former exclusively for Time Machine (which i will be using for the first time), and the latter for Windows. Initial back-up via TM was successful, as i was able to store about 80Gb of data from my Macintosh partition into the ext drive. The problem is this : After several days of backing-up data, Time Machine displays the same set of files as the initial one. During this time, i have made various additions to my iTunes library as well as movie clips and other documents. These changes/additions did not reflect on the subsequent back-ups made by TM. The initial size of the back-up data stayed the same, pegged at 80Gb. Am i doing something wrong here? The ext drive does not remain connected to my notebook always, and i only do force back-ups via the TM icon. Also, i have not encountered a single error/failed message when backing-up. On the options menu, i excluded only the Download folder. No other settings were altered. Any help would appreciated. I have just erased all my previous data from the TM, and is attempting to redo it now.