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| Price | $80.87 to $158.20 | $129.80 to $199.99 | $109.99 to $114.99 | $172.99 to $259.99 | $82.00 to $135.00 |
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| Features | |||||
| Buffer Size | 8 MB | Info unavailable | 16 MB | 8 MB | 8 MB |
| Spindle Speed | 7200 rpm | 7200 rpm | 7200 rpm | 5200 rpm | 4200 rpm |
| Dimensions (WxDxH) | 4.4 in x 7.4 in x 1.3 in | 1.6 in x 6.4 in x 7.5 in | 4.4 in x 7.4 in x 1.3 in | 2.8 in x 3.9 in x 0.5 in | 2.1 in x 2.8 in x 0.2 in |
| Average Seek Time | 8.5 ms | Info unavailable | 8.5 ms | Info unavailable | 15 ms |
| Capacity | 500 GB | 500 GB | 1 TB | 1 TB | 80 GB |
| Storage Controller | Serial ATA - Hi-Speed USB / eSATA | None | Serial ATA - Hi-Speed USB / eSATA | None | None |
| Vista Certification | Info unavailable | Works with Windows Vista | Info unavailable | Works with Windows Vista | Compatible with Windows 7 |
| Power Source | Included AC adapter | Included AC adapter | Included AC adapter | Info unavailable | Info unavailable |
| Type | Hard drive - External hard drive | Hard drive - External hard drive | Hard drive - External hard drive | Hard drive - Internal hard drive | Hard drive - Internal hard drive |
| Weight | Info unavailable | Info unavailable | Info unavailable | 4.1 oz | 1.6 oz |
| OS Required | Microsoft Windows Vista Apple MacOS X 10.2 or later Microsoft Windows 98SE/2000/ME/XP | Microsoft Windows 2000 Microsoft Windows Vista Apple MacOS X 10.3.9 or later Apple MacOS X 10.4.6 or later Microsoft Windows XP Home Edition Microsoft Windows XP Professional | Microsoft Windows Vista Apple MacOS X 10.2 or later Microsoft Windows 98SE/2000/ME/XP | Info unavailable | Info unavailable |
| Product Description | AcomData pureDrive PDHD500USE-72 - Hard drive - 500 GB - Hi-Speed USB / eSATA | FreeAgent Desktop - Hard drive - 500 GB - Hi-Speed USB | AcomData pureDrive PDHD1000USE-72 - Hard drive - 1 TB - Hi-Speed USB / eSATA | WD Scorpio Blue WD10TEVT - Hard drive - 1 TB - Serial ATA-300 | Toshiba MK8025GAL - Hard drive - 80 GB - ATA-100 |
| Interface Type | Hi-Speed USB / eSATA | Hi-Speed USB | Hi-Speed USB / eSATA | Serial ATA-300 | ATA-100 |
| Data Transfer Rate | Info unavailable | 480 Mbps | Info unavailable | 300 MBps | 100 MBps |
| Manufacturer Warranty | 1 year warranty | 5 years warranty | 1 year warranty | 3 years warranty | Info unavailable |
| Form Factor | 3.5" | 3.5" | 3.5" | 2.5" x 1/6H | 1.8" |
| Voltage Required | AC 120/230 V | Info unavailable | AC 120/230 V | Info unavailable | Info unavailable |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
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