February 8th, 2019, 6:06 pm
Open My Computer or File Explorer.
Find the USB flash drive in the list of drives connected to the computer.
Right-click on the flash drive icon and select Properties in the pop-up menu.
On the Properties window, click the Security tab.
Click the Edit button below the Group or user names section.
In the Permissions window, click the Everyone entry, if not already selected. In the Permissions for Everyone section, make sure the Allow checkbox is checked for the Modify entry. If it is not checked, check the box.
Click the OK button on the Permissions and Properties window to save the security permissions change.
If you want to set the flash drive to read-only for all users, in step 6, uncheck all boxes in the Allow column, except for the Read entry.