File sharing website with memberships (extensions?)

Hello every one! this is my first posst here ??

we are looking to create a sharing files website with membership system :
Membres who upload and share their files get a premium access and can download files uploaded by other membres.

By default they get one month access, if they continue to share they will get another month, etc. Else they loose access.

On another side, we will manually add those files and members permissions to an owncloud server to let them synchronize/download files directly, we believe thats cant be automated and integrated on WP, so it will be a manual task.

What extension can help us to manage memberships and let members upload files ?