Igor Pavlov

7z a a.zip -m0=lzma:d31:fb273 files 7z a a.7z -m0=lzma2:d31:fb273 files

7z a a.zip -m0=lzma:d31:fb273 files 7z a a.7z -m0=lzma2:d31:fb273 files

7-zip doesn't support that GNUSparseFile feaure now.

describe all levels and formats: 7z l a.tar 7z l GNUSparseFile.0 describe what sizes do you expect instead.

try latest 7-Zip 26.02

call 7za.exe a -spf archive.7z c:\dir\file.txt 7za.exe l archive.7z And you will see drive paths

You must use full path. Then it will be included: 7z a a1.7z c:\dir\file.txt 7z a -spf a2.7z c:\dir\file.txt First example doesn't include c:\dir\ prefix, and second example stores full path in archive.

Modification timestamps are important for archive update operations. We don't want users to accidentally disable this important option.