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If enough people do that, then attackers will start attacking dropbox, as well.

Hence my question. They'll ransom my Dropbox but Dropbox keeps deleted files and old versions around, so I'd be safe unless they specifically target Dropbox and Dropbox can't mitigate it.

Last time I used Dropbox, you can always get deleted versions back. They might make it difficult though, spamming the log with a gazillion created/deleted files. And maybe there is actually a limitation of, say, 10 deleted versions of the same file path (that might make sense)... but I don't remember seeing any of those limitations last time I looked at it (which was a few years ago).

But if you are a concerned customer, why don't you just head over to their help pages and see what the features and limits regarding history and file deletion are?

If there are certain restrictions to how far you can go back, they will likely find a way around that. If it's 10 versions of the same file path, they'll overwrite each path with a different single-byte file 11 times.

Versions are kept for a month. I once had a few hundred versions of one file a while back.

I think there was at least one type out there that detected dropbox, encrypted those as well and deleted shadow copies.

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