How to disable or remove File Sharing tab in Plesk so that it is not visible to customers?
It is not possible to hide File sharing tab as this functionality is not supported in Plesk at the moment.
File sharing is available for subscriptions that belong to admin. As a result, all users, associated with subscriptions that are owned by admin, will have File sharing option.
This functionality is not supported in Plesk at the moment. You may want to suggest new functionality in Plesk on Plesk User Voice portal.
The top-ranked suggestions are likely to be included in the next versions of Plesk. You can get the information about the updates in our products in the following public sources:
https://partners.plesk.com/ - public roadmaps for partners;
http://kb.plesk.com/subscriptions/index.html - knowledge base, each product update comes with corresponding KB article;
http://kb.plesk.com/rss/?p=PLESK - RSS feeds
Create a customer in Customers > Add new customer menu
Change the subscriber for the subscription in question to newly created customer in Subscriptions > example.com > Change Subscriber . This way subscription will be owned by a new customer, not by admin, thus, File sharing tab will not be available.