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Hyper-v Checkpoint disk Space...

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Hello,

I need help with running out of room issue and also understanding with checkpoints.  I am currently running Hyper-V Bear and hosting 2 VM's.  The host disk is running out of space so the VM's keep pausing-critical which I get.  Right Now I am trying to understand a few things.  The VM I am currently looking at has 3 checkpoints, the parent and then 2 others.

The parent is a win 7 build the first checkpoint, The second checkpoint is the win 10 upgrade, The third is the checkpoint with all the updates.

The disk is dynamic not fixed. the vhdx file is 87gb and the checkpoints avhdx files: CHKP1-100gb, CHKP2-165gb(added space to the c drive inside the vm) and CHKP-3 is 30GB

1.  If I merge the Checkpoints will it free up space by over writing or will it just combine.

2. I try to remove the first checkpoint but then the VM did not work. I am pretty sure it's because it part of the tree but I taught that by creating a new checkpoint would carry over all info so the previous checkpoint would only be needed for rollbacks. Was I wrong.

3.  The last checkpoint is the state I want to keep so how do I do so and get rid of the others without affecting the VM itself.

4.  I am able to add more space to the disk but wanted to learn how to also clean up VM. I also needed to understand how the space works because there is not alot of data stored on the VM.  The C drive is about 165 GB now and I am only using about 87gb so where is all the data coming from that is eating up the host disk?

5. Also in regards to a recycle bin, when I delete a fill is it stored somewhere that I can't see that may be eating up my disk space? 

Thanks for any insight that can be provided....


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