| Storage Device | Typical Capacity Range | Technology |
|---|---|---|
| Punch Card | 80 Characters | Paper-Based |
| Punched Tape | Few KB | Paper-Based |
| Magnetic Tape | MB to 50 TB+ | Magnetic Storage |
| Floppy Disk (8-inch) | 80 KB – 1.2 MB | Magnetic |
| Floppy Disk (5.25-inch) | 360 KB – 1.2 MB | Magnetic |
| Floppy Disk (3.5-inch) | 720 KB, 1.44 MB, 2.88 MB | Magnetic |
| Zip Disk | 100 MB, 250 MB, 750 MB | Magnetic |
| Jaz Drive | 1 GB, 2 GB | Magnetic |
| Hard Disk Drive (HDD) | 10 GB – 30 TB+ | Magnetic |
| Solid State Drive (SSD) | 120 GB – 100 TB+ | Flash Memory |
| NVMe SSD | 128 GB – 100 TB+ | Flash Memory |
| Hybrid Drive (SSHD) | 500 GB – 8 TB | Magnetic + Flash |
| USB Flash Drive (Pen Drive) | 128 MB – 4 TB | Flash Memory |
| Memory Card (SD) | 128 MB – 2 TB | Flash Memory |
| microSD Card | 128 MB – 2 TB | Flash Memory |
| Compact Flash Card | 8 MB – 512 GB | Flash Memory |
| SmartMedia Card | 2 MB – 128 MB | Flash Memory |
| Memory Stick (Sony) | 4 MB – 32 GB | Flash Memory |
| xD Picture Card | 16 MB – 2 GB | Flash Memory |
| CD-ROM | 650 MB – 700 MB | Optical |
| CD-R | 700 MB | Optical |
| CD-RW | 700 MB | Optical |
| DVD-ROM | 4.7 GB | Optical |
| DVD Dual Layer | 8.5 GB | Optical |
| DVD-R/RW | 4.7 GB | Optical |
| Blu-ray Disc | 25 GB | Optical |
| Dual Layer Blu-ray | 50 GB | Optical |
| Triple Layer Blu-ray | 100 GB | Optical |
| Quad Layer Blu-ray | 128 GB | Optical |
| M-Disc DVD | 4.7 GB | Optical |
| M-Disc Blu-ray | 25–100 GB | Optical |
| Enterprise Storage Arrays | 100 TB – PBs | Magnetic/Flash |
| SAN Storage | TB to PB | Network Storage |
| NAS Storage | TB to PB | Network Storage |
| Cloud Storage | GB to Exabytes | Remote Servers |
| Unit | Value |
|---|---|
| 1 Bit | 0 or 1 |
| 1 Nibble | 4 Bits |
| 1 Byte | 8 Bits |
| 1 KB | 1024 Bytes |
| 1 MB | 1024 KB |
| 1 GB | 1024 MB |
| 1 TB | 1024 GB |
| 1 PB | 1024 TB |
| 1 EB | 1024 PB |
| 1 ZB | 1024 EB |
| 1 YB | 1024 ZB |
| Device | Capacity |
|---|---|
| 3.5-inch Floppy Disk | 1.44 MB |
| CD | 700 MB |
| DVD | 4.7 GB |
| Dual Layer DVD | 8.5 GB |
| Blu-ray Disc | 25 GB |
| Dual Layer Blu-ray | 50 GB |
| Triple Layer Blu-ray | 100 GB |
| Quad Layer Blu-ray | 128 GB |
| SDXC Card | Up to 2 TB |
| Modern USB Drive | Up to 4 TB |
| Modern HDD | Up to 30 TB+ |
| Modern SSD | Up to 100 TB+ |
| Generation | Storage Device |
|---|---|
| First Generation | Punch Card |
| First Generation | Punched Tape |
| Second Generation | Magnetic Tape |
| Third Generation | Floppy Disk |
| Fourth Generation | Hard Disk |
| Fifth Generation | Optical Disk (CD/DVD/Blu-ray) |
| Modern Generation | SSD |
| Modern Generation | NVMe SSD |
| Modern Generation | Cloud Storage |