trouble SAN DISC USB Flash drive not appearing in Finder

CAn someone give me the troubleshooting steps to get a SAN DISC USB Flash drive to work. Here are the steps.

I have MacBook Pro 15-inch, 2016
I have a SanDisc USB Flash memory.
Plug it into a USB - USB-C adapter.

Anyway, when I open Finder it's not recognizing the chip.

So. I tried to close all applications and restarted the computer. Still nothing.

Very frustrating. Anything you recommend I do?
Who is Participating?
David Johnson, CD, MVPOwnerCommented:
try another computer i.e. a windows computer as it may be formatted as NTFS which Apples cannot natively read.. or boot from a linux distro and see if you can see the disk.. if you can't then it is probably damaged beyond simple repair
greghollAuthor Commented:
well, this particular USB drive has been used in this Mac before. i don't think that's the prob.
David Johnson, CD, MVPOwnerCommented:
it could simply become defective. using a linux distro will eliminate any OS problems.
greghollAuthor Commented:
Thanks. I tried a few other USB memory chips and they work fine. I guess it's a defective chip.
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