I'm looking to finally ditch Onedrive with a self hosted alternative, but I'm not sure what to go with. I want something with all of the files on a central server, with an Android client with the option to sync individual files for offline access as needed. Preferably the files should also be stored in plain format on the server to make backups easier and as a fallback if the service completely fails and I don't have time to fix it. Linux and Windows clients are a bonus but I'm happy just using a web gui if that's all that's available. These are the options I've considered so far:
Seafile - This was the one that I thought fit my needs the best until earlier but apparently it has a weird disk layout which means the files are basically inaccessible by anything else?
Nextcloud - I had originally ruled this out because I don't care about any of the additional features which people claim also slow it down and make it a bit of a resource hog, and I also don't want to deal with forced https. However I think the community image may actually be what I want as it seems to be just the file server and works with just http? I am a bit confused about the different options for the database though. https://hub.docker.com/_/nextcloud/
Syncthing - Not quite what I'm looking for as you need to sync the entire thing, and I don't like whatever weirdness is going on with the Android app at the moment
SAMBA share - Also not really what I'm looking for as there's no offline syncing, but very easy to set up and basically nothing to go wrong
Are there any other options I should be looking into?
I've set up filebrowser quantum and am pretty happy with it. I also have skipped over nextcloud due to the reasons you mentioned, as I really don't want all of the extra stuff, plus, I've heard it's a pain to maintain. Seafile wouldn't work for me for the same reasons as you.
The main thing it's missing is offline automatic syncing of files, though I'm not sure any self hosted file app supports that unfortunately.