I got given a small Synology box by a brother-in-law, and have not been impressed by their OS or apps, so I just use rsync. It's OK, but as my needs are simple I'm thinking of using an RPi solution instead.

(What was amusing was that I kept finding it powered off, and spent quite a while trying to find why it could be shutting down. It turned out that, because I kept it on the floor under my desk, the Roomba would occasionally bump into it and hit the power button on the front)