No TM only copies files to the backup that have changed, If the files has not changed it creates a pointer pointing back to the original file in an earlier backup folder. So unless you are adding or modifying many files its possible to have 100's of backups without much change in the backup disk usage. As photographers that is not what generally happens since we are constantly taking/adding photo's. Then modifying, and saving them to a different file.Now, let ignorant ol' me ask this... If I have, say, 300G of files on my main drive, if I have 3 b/u's, isn't that 900G on the b/u drive? If so, how can I have 10-28 b/up's?
Thanks for your help.
Craig,Just give TM a two or three Gig HD and let it do its thing. No need to intervene. Works far better than anything MS ever came up with.
Has saved my butt quite a few times.
If you run Windows in a VM, create a shared folder between the two (Win and Mac) and store all your Windows app data in there. Then tell TM not to back up the Windows VM. TM sees the whole VM as a single file, which is constantly changing.
Look in /Users/<username>/Documents/Virtual Machines.localized and you will see the VMs in there. They are large files (my Win7 is 81Gb).Craig,
When you do this, do you just exclude the VM software, or do you exclude the apps associated with it as well?
It did, thanks for the help!Look in /Users/<username>/Documents/Virtual Machines.localized and you will see the VMs in there. They are large files (my Win7 is 81Gb).
Each of these .vmwarevm files contains an entire VM. Another way to look at it, each of these files is the "C:" drive for the VM. These files, because they contain the entire VM, are constantly changing, so Time Machine will back then up over and over if you do not exclude them.
To exclude a file:
Open TM preferences.
Select 'Options' button. This opens a box that says "exclude these items from backups".
Press the + button. Navigate to the folder mentioned above and select the VM files.
Press 'Save' and you are done.
Copy the VM (must be shut down first) to a location where it will be backed up. You can use that to restore the VM if the original is lost. Because the copy is not modified, it will only be backed up once and will not fill your TM drive.
I hope this helps.