Result: A free USB drive from Keysight with bad sectors. It can't finish the target job, and I still have to buy another USB drive
Conclusion: No free lunch nowadays
The whole story:
I received the free USB
Syndrome: file damaged when transferring from DSOX2014A to my PC, e.g.
The test results: bad sectors
[ref] https://www.raymond.cc/blog/how-to-check-and-test-usb-flash-drive/
