On 20/03/2021 14:29, 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?

There are two extremes:-

SD card - cheap flash with basic controller aimed at storing large files
on a FAT32 filing system for use with cameras and misc players. Not good
for being a general purposing filing system for a computer.

SSD - good quality flash with a sophisticated controller, aimed at being
a general purpose read/write filing system for a computer, to replace a
hard disc. Has the best performance and long levity.

USB sticks are somewhere in between. The cheap and low profile ones are
often no better than SD cards when used in a Pi. The more expensive USB
3.1 and larger bar format may have a better flash and controller which
are closer in performance and long levity to a low end SSD.

My experience that an SD card when used in a very active Pi, can last as
little a year, but more often 2-3. A Samsung USB 3.1 bar, is much better
and I've only had one fail after 4 years. The SSDs I'm using including a
couple which had previously been used in a PC haven't had any failures
in over 6 years.

---druck

--- SoupGate-Win32 v1.05