External storage device
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United States of America Patent
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N/A
Issued Date -
Dec 30, 2004
app pub date -
Aug 14, 2003
filing date -
Jun 3, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Disclosed herein is an external storage device. The external storage device includes a non-volatile storage medium for storing digital data, a Universal Serial Bus (USB) port for providing an interface with an external apparatus, and an expansion slot for accommodating a conventional memory module. The external storage device provides access channels complying with USB Mass Storage Class (MSC) specifications so that the external apparatus accesses the non-volatile storage medium and the memory module, inserted into the expansion slot, through the USB port. When the external storage device receives a medium access command from the external apparatus through the USB port, the external storage device determines whether the medium access command aims to access the non-volatile storage medium or the memory module inserted into the expansion slot by interpreting the medium access command, and provides an access service corresponding to the medium access command.
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