Yes, it's a good idea, compression means the free space between blocks of data in the virtual disk are eliminated, reducing its footprint. But, I would like to comment this: I think this is unfair portrayal of what happened. Stuw DID provide links to Parallels Desktop documentation regarding Snapshots on the same post: He also asked you to post your problem ID, which you did and then on the same day you received the instructions by PM.
I have the same problem (pvm file more than double the size of C drive), but when I try to manage snapshots, it says I don't have any. How can I get rid of them?
And further, when I try to make changes to PVM, it says I can't because I have snapshots. But when I try to manage snapshots, it says I don't have any. ?????