Use the normal undelete tools you would use for a regular independent disk.
do you have a recommendation of such tools?
I have used R-STUDIO for the past 20 years and RECUVA.
both cannot scan my Z drive:
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R-STUDIO 5.4.134265 says
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The selected disk does not contain any supported file systems or the file system is corrupted. Select the Scan command from the Drive menu to find all partitions that have ever been located on the same disk space.
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RECUVA says
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Failed to scan the following drives:
Z:: Unable to determine file system type