If you don't want other members to edit the files in your Team/Group Folder, you can use the 'File lock' function. When a file is locked, other members can only read the file and cannot edit the file with the same file name.
When a file is locked, 
will be displayed on the list.
Lock a file
Members with the permission to edit can lock files in the Team/Group Folder.
Mobile
- Tap
of the file to lock. - Tap 'More info'.
- Toggle the 'Don't lock file' setting to set as 'Using File Lock'.
PC Web
- Click
on the top. - Click a Team/Group Message Room from the message room list on the left.
- Click the 'Folder' tab on the right side of the message room.
- Click
on the right side of the file you want to lock. - Click 'File lock'.
Check the file lock information
You can check the information on the locked file such as the date when the file was locked, and the person who locked the file.
Mobile
- Tap next to the file you want to check the lock information.
- Tap 'More info'.
- Check the date when the file was locked and the person who locked the file.
PC Web
- Click on the top.
- Click a Team/Group Message Room from the message room list on the left.
- Click the 'Folder' tab on the right side of the message room.
- Click next to the file you want to check the lock information.
- Click 'Locked file information' to check the 'Locking date' and the 'User who locked the file' in the 'Locked file information' window.
Unlock a file
Members with the permission to edit can unlock files in the Team/Group Folder. When a file is unlocked, the person who locked the file receives a notification.
Mobile
- Tap next to the file you want to unlock.
- Tap 'More info'.
- Toggle the 'Using File Lock' setting to set as 'Don't lock file'.
PC Web
- Click on the top.
- Click a Team/Group Message Room from the message room list on the left.
- Click the 'Folder' tab on the right side of the message room.
- Click on the right side of the file you want to unlock.
- Click 'Locked file information'.
- Click 'Unlock file' at the bottom of the 'Locked file information' window to unlock the file.