Help me! Private Server with remote access?

Hello fellow Techies, I need to know, if theres any kind of "private dropbox"? I work at a office with ca. 10 coworkers, and we are using a OSX-Server (mostly Apple Computers in office) and sometimes dropbox aswell, so customers can share files with us.

So the question is, if theres any kind of server which we can use within the office, but also give "guest access" to certain directories to our customers, so we do not have to use dropbox anymore (WeTransfer or anything like it, is not a solution). Any help is very welcomed.

Thank you all in advance - Lennster3000

Edit: If you know better subreddits to post this question, please let me know!

Submitted January 08, 2018 at 09:33PM by lennster3000 http://ift.tt/2Ekqrcj via TikTokTikk