If you have granted a user access to a file through sharing, you can modify or revoke the user’s access.
Click Shared by Me from any Filr page.
Select one or more files or folders being shared with one or more users whose access you want to modify or remove, then click Share > Share.
or
Click the drop-down arrow next to the file or folder that is being shared with one or more users whose access you want to modify or remove, then click Share File or Share Folder.
The Manage Shares dialog box is displayed.
(Conditional) To modify user access:
Select the users whose access rights you want to change, then select the new level of access in the Access Rights section. For more information, see Understanding Shared-Access Rights
In the Allow re-share with section, select whether you want them to be able to share with internal users, external users, the public, or via a File Link.
In the Expires field, select from the following options:
Never: The share never expires.
On: Select a given day for the rights to expire.
Rights expire at the beginning of the day that you select.
After: Specify a certain number of days for the rights to remain active.
Each day is counted as a 24-hour period from the time that you set the expiration.
If you want to include a personal note in the share, specify a note in the Note field.
Only the users and groups that you share with can read the note.
The share note cannot exceed 255 characters in length.
(Conditional) To remove user access, select the share that you want to remove, then click Delete.
Click OK.