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Member's Forum USB Memory stick and freezing temperatures
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Related

USB Memory stick and freezing temperatures

Workshopshed
Workshopshed over 1 year ago

My car has an in built sat nav and to update it there is a process that involves copying some very large files onto a USB stick and sticking that in the slot in the car. The car needs to be running whilst updating.

I've a long trip (for which I don't need maps) coming up so I left the memory stick in the car overnight so I don't forget it.

But

The temperatures here are dropping to -4°C over night.

So my question is. Will this cause me any problems for the memory stick? Don't intend on repeating this regularly so it is a one off.

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  • Workshopshed
    Workshopshed over 1 year ago +6
    Quick update. The memory stick worked fine and the maps were updated on route. By the time we hit the new road the car knew about it. Saved us a 20 minute detour which we'd done on the previous two trips…
  • misaz
    misaz over 1 year ago +4 suggested
    Most probably it will work well. All flash chips which I have seen as far has working range set to standard -40 to 85°C. Possible very high humidity was the worse enviromental factor, I think.
  • cstanton
    cstanton over 1 year ago in reply to Workshopshed +4 suggested
    Even in a sealable bag there may already be elements of moisture, and moisture is your enemy here for when it melts, especially with condensation. If you can put in pre-dried silicone pellets sachets…
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  • misaz
    0 misaz over 1 year ago

    Most probably it will work well. All flash chips which I have seen as far has working range set to standard -40 to 85°C. Possible very high humidity was the worse enviromental factor, I think.

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  • misaz
    0 misaz over 1 year ago

    Most probably it will work well. All flash chips which I have seen as far has working range set to standard -40 to 85°C. Possible very high humidity was the worse enviromental factor, I think.

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  • misaz
    0 misaz over 1 year ago in reply to misaz

    I checked some and it seems that vendors mention reduced temperature ranges on final products. For example, this (https://www.westerndigital.com/en-us/products/usb-flash-drives/sandisk-cruzer-blade-usb-2-0?sku=SDCZ50-032G-B35) has 0 to 45°C, but -4°C is still not very far from 0.

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  • baldengineer
    0 baldengineer over 1 year ago in reply to misaz

    I have seen very few consumer-rated flash chips (and many other ICs) with working ranges below 0°C. Their storage temperatures are probably rated for that, however.

    I doubt most USB flash drives are using industrial-rated devices. :)

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