[. . . ] Introduction to 2. 5" Portable HDD- H550 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main Features Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. 0 Mar 2010 2. 5" Portable HDD Revision History Revision A. 0 Date 2010/03/18 History New Creation Remark Important!!Please make sure the driver matches the part number on your pen drive before you download. One of following operation systems: Windows 98/98SE/Windows ME/Windows 2000/Windows XP The advertised memory capacity of this device represents unformatted capacity. Please note that once formatted and due to variations in flash module block limitations, the functional storage space will be lower than the advertised capacity. "PQI reserves the right to make changes without notification when fit, form, function, quality and reliability are not affected. The data sheets do not constitute contract documents and should not be considered part of the specification for purposes of any warranty. " Rev. Distinguishing itself from other portable hard drives on the market is it USB Turbo Boost function. Offering up to 53% more transfer speed, it boosts write speeds up to 90MB/Sec and read speeds up to 85MB/Sec. The boosted transfer speed comes in handy when transferring large capacity files. In addition, users can download Ur-Smart Mobile Office Software from the PQI website to effectively manage personal data. Main Features Overview Turbo Boost Function Compact and streamline shape design Mobile office software ­ Ur smart Sweet design of Pouch for Easy to carry 3. [. . . ] Pin Assignments Pin No. 1 2 3 4 Pin Name VBUS DM - USB DDP - USB D+ GND Power supply Function Data input/output: The bidirectional I/O transfers address, data and instruction information Data input/output: The bidirectional I/O transfers address, data and instruction information Ground Connection Rev. Physical Specifications 9. 1 Dimensions: 9. 1. 1 Height: 127. 5mm± 0. 1mm 9. 1. 2 Width: 81. 01mm ± 0. 1mm 9. 1. 3 Depth: 16. 4mm +0. 1, -0. 3mm 9. 2 Outline of top view Rev. [. . . ]