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This Article is about which USB memory sticks to use with the Fluke-1777, Fluke-1775 or Fluke-1773. 

Fluke engineering suggests using a USB-C memory stick at least USB version 3.1 for the 177X. 

The USB 3.1 supports double the transfer rate over USB 3.0 and 20 times faster than USB 2.0.