Warning: This is not recommended in a Hyper-V environment. To access the utility, right click any volume and choose Configure Shadow Copies. It is possible to change the shadow storage association to use a volume with sufficient free space The location can be changed from the Shadow Copies utility, or from the command line. If it is not clear which volume has insufficient space, see “How to Check Which Volume is Causing the Error”, below. The smallest amount of space that can be allocated is configurable, but Microsoft Support has recommended maintaining at least 42 MB free on the system reserved partition.

For virtual machines, the simplest solution is usually to increase the size of the VM’s hard disk, then expand the volume in Disk Management.Īlthough it is sometimes possible to create a shadow copy using less than 1% of the free space on a volume, 15%-20% free space is often required on busy volumes. If a volume is low on disk space, the solution is to delete files, expand the volume, or redirect shadow copies to another volume.

Within the VM guest OS that cannot be backed up or replicated, use the Disk Management utility (diskmgmt.msc) to view free space on each NTFS volume:

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