Why is the reliability suspect? I've had dozens of memory sticks go bad on me but every one of my NVME SSDs is still working fine.
go bad
Do you mean corrupt files or not being recognized by the operating system at all?
They stop being usable. I've never knowingly had data corruption on an otherwise usable memory stick. There are utilities that will sometimes 'revive' a bad stick but any data will be deleted in the process.
Maybe it was connected to some unstable power source such as an old RRCD 3720 CD player which could cause power spikes.
I don't know how good heat dissipation is with those cases.
Heat is not going to be a problem. For one the data transfer rate via USB is relatively slow. As well you won't be using it like a hard drive that has constant reading and writing.
For quick data transfers (e.g. 10 GB done when returning from a toilet session), heat won't matter much.
But for longer usage, it could.
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