Online Storage, which way forward? (Patreon)

Hey all, as always I'm looking for more feedback on how to streamline and make the patreon a better experience for everyone.

We're currently using Sync for our online storage, at the request of many members in the past but as of late more and more people are having quality of life issues much like some had with Dropbox.

So I'm looking at either another solution all together OR something to run alongside Sync as another option. The other option needs to have password protection and link expiry date facilities. 

I've put some poll options below but it's not exhaustive, so if you have a suggestion that would work then please let me know in the comments.

That said none of these are a guaranteed, just exploring options to hopefully have something in place in the next month or so.

Thanks for any help in advance.