Open Disk Management ( diskmgmt.msc ). Look for "Disk 1" or "Disk 2" that says "Unknown" or "Not Initialized." On Mac: Open Disk Utility. Look for the WD drive grayed out on the left sidebar.
The WD Elements is a robust, user-friendly device when used correctly. However, like all mechanical hard drives, it is vulnerable to logical corruption, power issues, and physical wear.
Guide to Setting Up and Fixing a WD Elements External Hard Drive