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What is the difference between 120GB SATA HDD 2.5 inch 5400RPM and 80GB 4200RPM Hard Drive?

What does SATA and HDD means? Also which one is better? These are from different mini laptops the 120GB SATA HDD 2.5 inch 5400RPM is from Inspiron Mini 10 and the 80GB 4200RPM Hard Drive is from the Inspiron mini 12 (Dell).

Speed, Size, power consumption

2.5" SATA Case USB 2.0 HDD Hard Disk Drive Enclosure 24 $4.55

2.5 SATA Serial ATA HDD/HD Hard Drive USB 2.0 Enclosure $4.55

USB 2.0 2.5 HDD HARD DRIVE SATA EXTERNAL ENCLOSURE CASE $4.55

Ultra Slim 2.5 USB SATA HDD Hard Drive Enclosure/Case $4.55

2.5 USB SATA Serial ATA HDD Hard Drive Enclosure/Case $4.55

USB 2.0 SATA 2.5 HDD/HD Hard Drive Disk Case Enclosure $4.55

Slim USB 2.0 Enclosure Case for 2.5 SATA HDD Hard Drive $4.55

Supper Slim 2.5 USB SATA HDD Hard Drive Enclosure/Case $4.55

2.5 USB 2.0 SATA Serial ATA HDD Hard Drive HD Enclosure $4.55

RMVB RM 2.5" SATA HDD DivX Player MP3 TV DVD MPEG-4 CD $45.71

USB 2.0 2.5 SATA HDD/HD Hard Drive/Disk Enclosure/Case $4.55

New USB 2.0 2.5 SATA HDD Hard Disk Drive Case Enclosure $4.55

USB 3.0 SATA Serial ATA 2.5" HDD Hard Disk Drive Case $25.99

USB 3.0 SATA Serial ATA 2.5" HDD Hard Disk Drive Case $24.90

2.5 HARD DRIVE SATA HDD EXTERNAL ENCLOSURE CASE USB 2.0 $4.55

Enclosure 2.5 inch SATA External USB 2.0 Silver HDD NEW $3.95

2.5 USB SATA Hard Drive HDD External Enclosure Silver $3.95

USB 2.5" SATA Hard Drive HDD External Enclosure Black $4.65

Black 2.5" SATA HDD USB 2.0 Hard Drive Disk Enclosures $6.15

SATA 2.5 USB 2.0 Enclosure Hard Drive HDD HD Case Red $3.95

USB 2.0 2.5" SATA HDD External Enclosure Case Box Green $6.60

USB 2.0 2.5" SATA HDD External Enclosure Case Box Blue $6.60

Green USB 2.0 2.5" SATA HDD Enclosure Caddy Case Box $6.60

2.5 USB 2.0 SATA Hard Drive HDD External Enclosure Blue $7.75

USB 2.5 SATA HDD Hard Drive External Enclosure Caddy,1K $4.65

USB 2.0 / SATA 2.5 Serial ATA HDD Enclosure/Case + Bag $4.55

USB SATA HDD Hard Drive Disk Case/Enclosure External $4.55

LOT 5 USB SATA 2.5 EXTERNAL HDD HD ENCLOSURE WHOLESALE $26.60

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USB 2.0 External Enclosure for 2.5 SATA Serial ATA HDD $4.55

USB 2.0 2.5" SATA Hard Disk Drive HDD Enclosure Case $3.95

USB 2.5 SATA HDD Hard Drive External Case Enclosure NR $4.65

Slim Aluminum Enclosure for 2.5" SATA II HDD w/ USB 2.0 $3.95

USB 2.0 2.5" SATA Hard Disk Drive Enclosure/Case HDD/HD $3.95

USB 2.0 2.5 HDD HARD DRIVE SATA EXTERNAL CASE ENCLOSURE $7.99

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USB 2.5 HARD DRIVE HD SATA HDD EXTERNAL ENCLOSURE CASE $4.55

USB 2.0 2.5" SATA Hard Disk Drive Enclosure/Case HDD $3.95

USB 2.0 2.5" SATA HD HDD Hard Disk Drive Case Enclosure $4.55

USB 2.0 2.5" SATA HDD HD Hard Disk Drive Case Enclosure $4.65

2.5 USB 2.0 Hard Drive SATA HDD External Enclosure Case $4.65

SATA 2.5" USB HDD Hard Drive Case External enclosure $3.95

USB 2.0 2.5 HARD DRIVE SATA HDD HD ENCLOSURE CADDY CASE $4.65

USB 2.0 2.5 HARD DRIVE SATA HDD PC ENCLOSURE CADDY CASE $4.65

2.5 USB 2.0 SATA HDD Hard Drive External Case Enclosure $4.55

USB 2.5" SATA HARD DISK DRIVE HDD CASE Enclosure #5106 $4.55

USB 2.5" HARD DRIVE SATA HDD ENCLOSURE EXTERNAL CASE S $4.55

USB 2.0 2.5" SATA HD HDD Hard Drive Enclosure/Case +Bag $3.95

USB 2.5 SATA Hard Drive HDD External Enclosure Case,1S $4.55

USB SATA 2.5 HARD DRIVE HDD EXTERNAL ENCLOSURE CASE 1B $4.60

2.5" SATA hard drive HDD USB External Enclosure Case 2S $3.95

USB 2.0 2.5" SATA HDD Hard Drive Enclosure/Case +Bag $$ $4.55

USB 2.5 SATA HDD Hard Drive External Enclosure box,3B $3.95

USB 2.5 SATA HDD Hard Drive External Enclosure Case,3S $3.95

LUXURY POCKET SIZE 2.5 USB2.0 SATA HDD CASING ENCLOSURE $6.60

USB 2.0 SATA 2.5" HDD External Hard Driver Enclosure $4.55

USB 2.0 Hard Drive Enclosure Case for 2.5" SATA HDD $6.60

2.5 USB External Hard Drive Case HDD SATA Enclosure $6.35

2.5" USB SATA Hard Disk Drive Enclosure HDD Caddy Case $6.35

USB 2.5" SATA Hard Drive HDD External Case Enclosure $4.65

2.5" USB 2.0 SATA HDD Hard Disk Drive Enclosure Box $6.35

2.5"SATA Hard Drive HDD External Case Enclosure Storage $6.60

Wholesale LOT (10) SATA 2.5" USB HDD External Enclosure $61.40

HDD Enclosure 2.5" SATA External Hard Drive USB 2.0 NEW $6.35

!NEW USB 2.0 2.5 " HARD DRIVE SATA HDD ENCLOSURE CASE $4.65

NEW 2.5" SATA HARD DISK DRIVE HDD CASE ENCLOSURE USB2.0 $3.95

Aluminum 2.5" SATA to USB HDD Enclosure w Auto Backup ! $3.95

2.5" USB 2.0 SATA HDD Hard Disk Drive Enclosure Case $3.95

2.5 HARD DRIVE HDD SATA EXTERNAL CASE ENCLOSURE USB 2.0 $4.55

2.5" SATA USB 2.0 HDD Hard Disk Drive Enclosure Case $4.55

2.5 HDD Hard Drive SATA External Enclosure Case USB 2.0 $3.95

USB 2.5" HARD DRIVE SATA HDD ENCLOSURE EXTERNAL CASE Si $3.95

2.5 inch USB SATA HDD/HD Hard Drive Disk Enclosure/Case $4.60

2.5 inch SATA HDD HD Hard Disk Drive External Enclosure $4.65

2.5 HARD DRIVE HDD SATA EXTERNAL ENCLOSURE CASE USB 2.0 $3.95

2.5 HARD DRIVE SATA HDD EXTERNAL CASE ENCLOSURE USB 2.0 $6.35

USB NEW 2.5 HARD DRIVE SATA HDD ENCLOSURE EXTERNAL CASE $2.65

2.5 inch SATA HD Hard Drive Disk External Enclosure HDD $3.95

USB 2.5" SATA HARD DISK DRIVE HDD CASE BOX Enclosure $4.65

USB 2.0 SATA 2.5" HDD External HD HDrive Enclosure Case $6.35

External USB SATA 2.5 Inch HDD Hard Drive Enclosure $6.60

2.5" USB SATA HDD Hard Drive Disk Enclosure Case $6.60

USB 3.5 SATA HDD Hard Drive External Enclosure Case, S $12.00

IDE SATA Hard Disk HDD USB eSATA Docking + Card Reader $39.31

USB 2.0 2.5" SATA HD HDD Hard Drive Enclosure/Case $4.60

NEW USB 2.0 2.5"SATA HARD DISK DRIVE HDD CASE ENCLOSURE $6.35

New Generic 2.5" USB2.0 Silver SATA HDD enclosure $4.55

USB 2.0 2.5 SATA HARD DISK DRIVE HDD CASE ENCLOSURE $4.45

2.5" Black Wire Mesh USB 2.0 SATA Hard Drive Disk HDD E $6.35

2.5" White Wire Mesh USB 2.0 SATA Hard Drive Disk HDD E $6.35

2.5" Blue Wire Mesh USB 2.0 SATA Hard Drive Disk HDD En $6.60

2.5" Green Wire Mesh USB 2.0 SATA Hard Drive Disk HDD E $6.60

2.5" Pink Wire Mesh USB 2.0 SATA Hard Drive Disk HDD En $6.60

2.5" Black USB 2.0 SATA Hard Drive Disk HDD Enclosure C $4.65

2.5" Blue USB 2.0 SATA Hard Drive Disk HDD Enclosure Ca $4.60

USB 2.0 to IDE SATA S-ATA 2.5 3.5 HD HDD Adapter Cable $17.96

3.5" SATA HDD ENCLOSURE USB 2.0 & ESATA NEW $18.70

2 SATA Data Cable Serial ATA For CD RW DVD RW HDD 18" R $3.48

2 x 18" 90 Degree Right Angle Serial SATA HDD Cable New $3.99

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Snap-in Mobile Rack for 3.5 Sata HDD with Sata Interface $30.24 SNAP-IN MOBILE RACK FOR 3.5...

Max 4 HDD 3.5 SATA Rack Thermaltake Max 4 3.5" HDD Rack Interchangeable Tray for SATA Hard Drives...

5BAY 2.5IN Sata Hotswap HDD Cage $14.99 5 x 2.5" - Front Accessible - Serial ATA - Internal...

Hua 2.0TB Sata 3GB/S 7.2K Rpm mfr: Supermicro HITACHI HUA 2.0TB SATA 3GB/s 7.2K RPM 32M 3.5" P/N 0F10452; can only be ordered with MB/Chassis This item cannot be shipped to APO/FPO addresses. Please accept our apologies....

Seagate Barracuda 7200 1.5 TB 7200RPM SATA 3Gb/s 32MB Cache 3.5 Inch Internal Hard Drive ST31500341AS-Bare Drive $84.78 The Seagate Barracuda 7200.11 drive the 11th generation of this award-winning desktop hard drive family delivers 1.5 TB of high-performing, eco-friendly digital storage. Designed with industry-leading acoustics and power levels, and award-winning Seagate PMR technology, the Barracuda 7200.11 drive offers the ideal combination of world-class technology. Main Features Manufacturer : Seagate Technolo...

2.5 USB 2.0 SATA Hard Drive HDD Case Enclosure - Silver $2.98 Portable mobile storage! Connect your 2.5-inch notebook SATA hard drive to a USB port with this External AluminumSATA HDD Enclosure. With its USB 2.0 interface, you'll get quick data transfers of up to 480 Mbps. Its Silver aluminum casing keeps your hard drive cool for maximum performance and its self powered design means there is no power adapter to carry. For a low cost solution for your externa...

USB 2.0 to SATA/IDE Cable Adapter For 2.5 3.5 HDD $5.35 USB 2.0 to SATA/IDE.Use your 2.5-Inch / 3.5-Inch IDE hard drive or SATA hard disk as an additional external hard drive....

USB 2.0 2.5 HARD DRIVE SATA HDD EXTERNAL CASE ENCLOSURE $2.41 Made strong with Aluminum Magnesium alloy Material. Case Size: 122 x 74 x 14 mm. NOTE: Interior Dimension 101 x 70 x 10 mm (Thicker Older models might not fit). LED indicator monitors the reading movements of the hard disk drive.Connectors: External Power and Data - High speed USB 2.0 mini-5pin; Internal Power and Data - SATA (Serial ATA).Package Includes: 2.5-inch USB 2.0 External Aluminum HDD En...

USB 2.0 Enclosure Case for Laptop 2.5 SATA Hard Drive $2.41 Made strong with Aluminum Magnesium alloy Material. Case Size: 122 x 74 x 14 mm. NOTE: Interior Dimension 101 x 70 x 10 mm (Thicker Older models might not fit). LED indicator monitors the reading movements of the hard disk drive.Connectors: External Power and Data - High speed USB 2.0 mini-5pin; Internal Power and Data - SATA (Serial ATA).Package Includes: 2.5-inch USB 2.0 External Aluminum HDD En...

Airlink101 AEN-U35SAB 3.5-Inch USB 2.0 Aluminum External SATA HDD Enclosure $15.00 AIRLINK AEN-U35SAB Airlink AEN-U35SAB 3.5 inch SATA-USB2.0 HDD Enclosure (Black). N Internal (AENU35SAB)Product Details: Manufacturer: AIRLINKPart Number: AEN-U35SABCategory: Enclosures Interface: SATA Capacity: N/ARotation Speed: N/A Form Factor: InternalItem Condition: HDExchanges SKU#: SKUB8212Product Highlights:90 Days Unlimited WarrantyExtended Warran...