1. Right-click on the folder where you want to remove the lock icon, then select the bottom "Properties" in the pop-up menu
2. After opening the folder Properties window, click on the "Share" option, then click the "Share" button in the "Network Files and file sharing" settings box below.
3. In the Open File Sharing dialog box, click the Down triangle button following the input box and select Everyone in the list of system users that pops up
4. After selecting everyone, the "Add" button after the input box is available, click the Add button to add everyone to the list of shared users
5. Select Everyone in the Shared Users list and click the Share button at the bottom right
6. At this time we found that the folder above the lock icon has not been, but we have changed the properties of the folder, changed the share, this is not what we need, the following we will be the shared properties of this folder to cancel the hungry, click the Advanced share below the "Advanced sharing" button
7. In the Advanced sharing dialog that opens, we can view some properties about the share, this folder is shared, and the shared name of the folder, and you can set more sharing permissions and caching
8. Remove the top "Share this folder" check box, then click on the app and confirm button below to cancel the folder sharing
9. Back to the file browser, we can see the properties and changes of the file. In the same way as above, you can remove the locks of other folders with locked icons.