@Condobloke :-
You
can find some sticks like this, Brian.....but they're usually older models. I haven't seen this "feature" on flash drives for several years....and I buy a LOT of 'em. And of course, the full-size SD/SDHC/SDXC cards all have one of these.
The Sandisk Ultra - I'm guessing the OP probably means the Ultra "Fit".....but I could be wrong - is one of these teeny-weeny 'nano'-sized flash drives. I have no end of these.
80% of its size is just the plug, and the 'cap' is minute.....usually, just big enough to grip with the tip of the thumb & forefinger to pull 'em out. With these, the NAND flash chip is actually
inside the plug! Nowhere to put a write-protect switch at all...
SanDisk have had write-protect 'issues' for many years with their flash drives. Much of it eventually got traced back to their chip supplier, Hynix....who refused to accept responsibilty, of course. They only ended an epic court case over this very point a couple of years ago - it had gone on for nearly 12 years by then! - with both sides finally realising the huge amounts of capital they'd wasted during those years. For both stubborn parties, no settlement was ever reached.........but still neither would own up to anything.
I joined their forums some years ago because I had one of their drives, gone the same way (the all-plastic Cruzer 'Blades'). They had a long-running thread about this write-protect thing (3 1/2 yrs & counting at that point in time). Buried away on an obscure forum page, there used to be a link to a technical blog that went into a lot of detail about the how & the why. I'd link y'all to it, but the link - although still there - is long dead....
@MikeRocor :-
We had a discussion round this point on the Puppy forums, some years back. One of our older members, a retired guy who used to work in the industry, informed us it's possible - under the right circumstances - for the read/write 'bit' inside the drive's controller chip to accidentally get 'flipped' to read-only.
When that happens, the drive is stuffed.....because there is no software way to reset it. The NAND flash is still fine, but the controller chip is no longer allowing data to reach it from the external connection.
This
can happen due to a tiny 'static' electric shock. It doesn't take much, with the almost non-existent voltages these things now run on.
Mike.