How to merge two partitions of external hard disk on Windows 10/11?

Sometimes, we overlook the impact on drive letters. After merging to two partitions of external hard disk, the letters might get reassigned, leading to confusion if you're used to certain letters for certain drives. So keep track of your drive letters (like D:, E:, F:) and reassign them in Disk Management if needed after you're done merging. Just right-click on the partition and choose "Change Drive Letter and Paths." And take your time and double-check everything before confirming any deletions or merges. Trust me, a little patience can save you a lot of headaches later.