On Sat, 20 Mar 2021 16:29:04 +0200
Tauno Voipio  wrote:

> I'm just curious: What makes a Flash memory on an USB interface
> more durable than a Flash memory on a SD card?

 Nothing in principle, except the quality and type of the flash
memory (there are a lot of types) and the on-board controller. All flash
memory (including SLC SSDs) are subject to write wear due to the mechanism
and write amplification due to large block sizes - how quickly they wear
depends on the flash technology used, the sophistication of the controller
(wear levelling, TRIM etc) and the quality of manufacture. Micro SD cards
tend to be towards the bottom end of everything - NVMe SSDs sold for data
centre use tend to be towards the top.

 USB sticks are very variable IME but the good ones are a lot better
than any micro SD card.

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