| Seagate | 1978 | USA | HDDs, SSDs | Barracuda, IronWolf, Exos |
| Western Digital (WD) | 1970 | USA | HDDs, SSDs | WD Blue, WD Black, WD Red |
| Toshiba | 1939 | Japan | HDDs, SSDs | X300, N300, Canvio |
| Samsung (Now Part of Seagate for HDDs, Still Makes SSDs) | 1938 | South Korea | SSDs | 980 Pro, T7, PM9A1 |
| Hitachi (HGST, Acquired by WD) | 1910 | Japan | HDDs (Now WD) | Ultrastar, Deskstar |
| Fujitsu (Now Part of Toshiba) | 1935 | Japan | HDDs (Discontinued) | N/A |
| Intel (SSD Division, Acquired by SK Hynix) | 1968 | USA | SSDs | Optane, SSD 670p |
| SK Hynix | 1983 | South Korea | SSDs | Platinum P41, Gold P31 |
| Micron (Crucial) | 1978 | USA | SSDs | Crucial MX500, P3 Plus |