Proton Drive: Checksums!
It would be wonderful to be able to compare checksums between a file stored on Protonmail servers and a file stored locally, before deleting the local copy. I don't really want to re-download a file to check integrity on either end.
Mitch Wagner
shared this idea
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Anonymous
commented
Very good idea. On the infrastructure side, it would make automatic de-duplication possible (saving disk space), and on the user side it would also make it trivial to search for a file by its fingerprint.
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YourName
commented
Please see also https://protonmail.uservoice.com/forums/932839-proton-drive/suggestions/43548012-failed-files-when-uploading-feature-to-retry-all in combination with this feature.
You could implement a simple file size check if checksums are difficult. Even that would improve the mess that failed uploading and retries are currently.
Until there is a desktop app, we need an automated way to compare file size/date/checksum of an entire folder and subfolder locally vs on the website, and reupload or download the inconsistent files.
I'd say the simplest way for now would be the option "Get MD5 checksum" for a file or folder on the web (the folder option would calculate a checksum for all files and subfolders), and give us a little utility for Windows/Linux/Mac to that would do the same locally, so we could compare the two and make changes manually where we find them. This should be reasonably quick to code.