1,000 or 1,024?
Storage makers and phone settings count in decimal: 1 GB = 1,000 MB = 1,000,000,000 bytes. Windows and many apps count in binary: 1 GB (really a gibibyte, GiB) = 1,024 MB = 1,073,741,824 bytes. That's why a "512 GB" drive shows as about 476 GB in Windows. Tick the binary box above to match Windows.
Quick reference (decimal)
| Unit | Bytes | Fits roughly |
|---|---|---|
| 1 KB | 1,000 | Half a page of text |
| 1 MB | 1,000,000 | One photo (compressed) |
| 1 GB | 10⁹ | About 1 hour of HD video |
| 1 TB | 10¹² | About 250,000 photos |
Bits vs bytes: internet speeds are in megabits (Mbps). A 100 Mbps connection downloads 12.5 MB per second.