External Hard Drive Size Problem I recently bought a 4 TB Seagate Desktop Expansion external hard drive. However, after formatting it with Disk Utility the device still says 4 TB but the capacity says 1.8 TB. What is going on?
Did you completely wiped it via the Apple Disk utilities and formatted it Mac Journaled? It might look like you kept a partition of the disk (FAT32 or NTFS)