K42.7z -

You can skip compression while still including files by setting the compression level to 0 (store).

Tell gzip/bzip2/7z/etc not to compress already-compressed files? K42.7z

The 7z command is a powerful archiving tool that supports multi-threaded compression (LZMA2) and split archiving. Here is a write-up summarizing key technical considerations when using 7z: You can skip compression while still including files

Using algorithms like LZ4 is recommended for data that is already compressed, as it prevents inefficient re-compression and speeds up the process, achieving high compression/decompression speeds. such as /dev/sda1

Information on into smaller parts? Let me know which direction helps you most.

7z can be used to archive the contents of block devices, such as /dev/sda1 , by piping data from cat or similar commands. Typical Scenarios