Unlike Windows operating system you cant just right click on the drive or partition and select the rename option in the menu to rename the drive or partition. Linux Mint KDE has Dolphin file manager and it lack this feature so you have to do this via KDE Partition Manager which is present by default in the Mint Linux KDE. All you need is to follow the following steps. 1. Click on the Menu button in the panel search for "KDE Partition Manager" and open it. 2. From the "Device" section in this utility i.e KDE Partition Manager, Select the desired drive. 3. Double click the partition that you wish to rename/lable and in the "Label" section type the desired label and click OK. 4. We are not done yet. Now click "Apply". 5. Its all done now.