I'm looking for an E2EE zero-knowledge cloud that lets you work with large DMG image files (in the 200 to 400GB size) in a friendly way. By "friendly" I mean that you can mount the DMG from a Mac and get it in Finder and that if you modify a file, you don't overwrite the whole DMG image, but only the fraction of it where the modified file resides.
Note: I assume a commercial, non-free cloud. Money is not a constraint (it will be considered later, once I know the options).
Before you are tempted to suggest storing the files inside the DMG instead of the DMG, no, that's not an option, because I wish to keep all the file data, metadata, permissions, symbolic links, etc, of the APFS filesystem.
I considered tresorit, but it limits the file size, and besides found a reddit post saying it overwrites whole files, not just the modified chunks.
I've been told that Dropbox can do this nicely, but it's not E2E (and also "I've been told", but I don't have an actual proof of that). I could of course encrypt the DMG, but I'm not 100% happy with the idea of anybody being able to get my DMG even if it's internally encrypted.
Do you know of any cloud that would fit?
Thanks!
Note: I assume a commercial, non-free cloud. Money is not a constraint (it will be considered later, once I know the options).
Before you are tempted to suggest storing the files inside the DMG instead of the DMG, no, that's not an option, because I wish to keep all the file data, metadata, permissions, symbolic links, etc, of the APFS filesystem.
I considered tresorit, but it limits the file size, and besides found a reddit post saying it overwrites whole files, not just the modified chunks.
I've been told that Dropbox can do this nicely, but it's not E2E (and also "I've been told", but I don't have an actual proof of that). I could of course encrypt the DMG, but I'm not 100% happy with the idea of anybody being able to get my DMG even if it's internally encrypted.
Do you know of any cloud that would fit?
Thanks!