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In the HOBOware and HOBOmobile Launch screens there is a number that is presented as "Logging Duration" (see attached screen shot)
Click on these links for YouTube videos on the following HOBOware Pro Data Assistants:
When you relaunch a HOBO data logger, the device reverts to the beginning of its memory and starts writing new data over the old.
A few years back, Apple removed traditional USB ports and went to something called USB-C. This makes everything incompatible, including HDMI & Ethernet cables.