Is there such a thing as a WORM (write-once-read-many) SD memory card or USB flash drive? [closed]

Do you know if exists a write-once-read-many (aka: WORM) USB flash or SD memory?

I need an electronic write once memory to meet law requirements for storing sensitive data, and I want an alternative to my actual solution of CD-R discs.

I found that SanDisk produced some WORM SD card, but now this kind of card seems to be out of production.

Given that DVD/CD drives are now more often external and connected via USB, they do not conflict with your request for an alternative.

I agree that CD-R discs are not ideal, especially after having a couple go bad on me after a few years. But you could instead upgrade to the compatible M-DISC, where M stands for Millennium.

While I don't know if an M-Disc will really hold for a thousand years, or that anyone will care about your data at that time, M-Discs have become much cheaper in the last few years. For example on Amazon, Millenniata 4.7GB M-Disc Write Once and Read Forever, Read 16x/Write 4x Speed, 50 Pack goes today for $124.95. You can also today find Blu-ray M-Discs.

You would have to choose carefully your DVD/CD drive for compatibility with M-Discs. I have found this M-Disc's list of devices that can write, but I cannot vouch for its completeness.

If you wish to go up another notch, you could pass to WORM tape cartridges, but there you are multiplying the price-tag by a factor of 10.

SD WORM cards seem to have gone out of fashion, while Flash-using WORM seems not to exist. So as far as I can see, the options that are left are CD-R, M-Disc or tape.