Measurement data can have multiple GigaByte and it usually does not change. Do not store multiple copies of the same files as backup. Use a content-addressable store or file system or a file system with similar functionality, for example, btrfs with cp --reflink=always ..., OpenZFS with copy-on-write clones, or the content-addressed composefs. A low-tech solution may use simple SHA-256 or SHA-3 hashes with symlinks into a directory with only content-addressed files whose names are but their hash value. And another solution may be using Git LFS or git-annex without a remote.
Measurement data can have multiple GigaByte and it usually does not change. Do not store multiple copies of the same files as backup. Use a content-addressable store or file system or a file system with similar functionality, for example, btrfs with
cp --reflink=always ..., OpenZFS with copy-on-write clones, or the content-addressed composefs. A low-tech solution may use simple SHA-256 or SHA-3 hashes with symlinks into a directory with only content-addressed files whose names are but their hash value. And another solution may be using Git LFS or git-annex without a remote.