I was searching for an answer to the same question when I found this old thread.
I have my Time Machine backups from my main computer, on a 1TB partition of a 1.5 TB external HD. The remaining 500 GB was being used to store backups from my old Powerbook running Tiger (which is not Time Machine compatible). Recently I changed my setup and moved Powerbook backups to a separate drive and freed that 500 GB partition. Now that I don't need to use it for anything but my Time Machine backups, I want to reformat the hard drive into a single partition.
On the other hand, because of the way the HD was formatted, I can't resize the the existing partitions without erasing them. I could move the TM backup to a 750 GB HD that I have, only if it didn't need 850 GB of free space. I can think of two possible solutions but honestly I don't think any of them would work. Here they are:
- Do you think I can compress the TM backup folder and expand it later without losing anything?
- Is there a way to clean older backups effectively so that I could trim about 100 GB of the Time Machine backups?
Any comments?