Functionally it’s good and fast. Privacy-wise I would recommend at least encrypting the files before uploading. Cryptomator would help if your friend is willing to use it. VeraCrypt volumes also work, and they sync quickly because Dropbox is smart enough to only update the bits of the volume file that have changed.
If you’re looking for something similar but not US-based, pCloud is good and allows you to save the data in Europe. But encrypt your files there too.
Functionally it’s good and fast. Privacy-wise I would recommend at least encrypting the files before uploading. Cryptomator would help if your friend is willing to use it. VeraCrypt volumes also work, and they sync quickly because Dropbox is smart enough to only update the bits of the volume file that have changed.
If you’re looking for something similar but not US-based, pCloud is good and allows you to save the data in Europe. But encrypt your files there too.
TIL. I wonder what other cloud storage providers do this too.