Carpometacarpal (CMC) osteoarthritis (OA) , also known as trapeziometacarpal osteoarthritis or osteoarthritis at the base of the thumb, is a reparitive joint disease affecting the first carpometacarpal joint (CMC1).he CMC1 joint is a synovial joint between the trapezium bone of the wrist and the metacarpal bone at the base of the thumb. This joint is a so-called saddle joint (articulatio sellaris), unlike the CMC joints of the other four fingers which are ellipsoid joints.
Safely remove your flash drive. Not doing this can corrupt data or ruin a perfectly good flash drive. You can safely remove the drive by right clicking its icon on the desktop or system tray, and selecting the option that says Safely Remove Hardware or Eject from the menu.
Format the external hard drive. Formatting the drive erases all of its data in a process designed to prepare the drive for use with a certain operating system and file system. The process is simple. 1  On a computer running Windows, right-click on the drive's icon and select Format from the context menu. On a Mac, open the Disk Utility application by clicking on its icon in the Applications folder. 2  Select your external hard drive in the left panel and then click the Erase button in the right panel (under the Erase tab). 3  Click OK to format the drive.