https://cygwin.com/pipermail/cygwin/2003-May/099508.html
SPARSE files considered harmful - please revert
sparse filesconsideredharmfulpleaserevert
https://kb.synology.com/en-br/DSM/tutorial/smb_sparse_file_inflate_after_copied
Why do sparse files expand to their full size after transferred via SMB? - Synology Knowledge Center
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