Hi,
Thanks for posting on our forum!
Based on your description, I would like to check:
- You encountered this issue AFTER you expanded your disk? And then, your scheduled backup came and your Hyper-V began to create several checkpoints? I am a little confused about the sequence of events.
2) Did you have any error messages when your Veeam backup failed? I would appreciate it if you could send me any screenshots about the failure.
Secondly, I agree with @Philippe Levesque that your issue may be caused by storage shortage, you should check your storage condition in Disk Management. And you can follow @Philippe Levesque 's advice to use VSS and clean up any checkpoints that you do not need.
Besides, if the issue is not related with your storage, then I think you can also query supporters from Veeam, in case there is any Veeam-related issues.
Thanks for your support! Have a nice day! : )
BR,
Joan
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