CRC check can be simply described as: for example, we want to send some data (information field), in order to avoid some interference and at the receiving end to determine whether to accept the true data of the read data, then we have to add the check data (i.e. CRC code), to judge whether the received data is correct.

new 1.txt
__MACOSX
__MACOSX\._new 1.txt

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