If a cloud backup provider (for example) is storing laptop backups, some files will be identical (Windows or Mac OS system libraries, for example).
The best way to store these would be to have a single copy for all of them. So, when a file is uploaded, a digest of the file could be computed and then matched to a stored copy matching that digest.
is there any product out there to do specifically this? (I know key-value stores can achieve it, but they were not designed or optimized for it)
Thanks for any feedback!