| 摘要 |
An expandable function data storage device includes a first main body and a second main body. The first main body has a memory circuit unit. Its first end is exposed outside and has a first signal communication port and its second end has a second signal transmission port. The second main body has a reception space and can be sleeved on and connected to the first main body, to protect the first signal transmission port. Specifically, the second main body includes an application circuit unit, and a third signal transmission port is provided in the reception space. When the second main body is sleeved on and connected to the second end of the first main body, the second signal transmission port is electrically connected to the third signal transmission port, so that the memory circuit unit may transmit/receive data to/from the application circuit unit.
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