Have you tried using a different compatible USB cable, you didn’t say?
I don’t know the phone and it is not shown in the [https://xphone24.com/manual-user-guide/OnePlus_5T_EN.pdf|user manual] but maybe check what the USB settings are set for in ''Developer'' ''Options > USB Debugging'' in the ''Settings'' menu of the phone.
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Also try using the phone in [https://www.hardreset.info/devices/oneplus/oneplus-5t/safe-mode/|safe mode] and check it it works OK or not if neither of the above solves the problem.
Hi @salmonberries79
Have you tried using a different compatible USB cable, you didn’t say?
I don’t know the phone and it is not shown in the [https://xphone24.com/manual-user-guide/OnePlus_5T_EN.pdf|user manual] but maybe check what the USB settings are set for in ''Developer'' ''Options > USB Debugging'' in the ''Settings'' menu of the phone.