I have 2 SanDisk GB flash drives (256 GB with USB-A & USB-C ends, and
512 GB with old USB-A). They both get burning hot quickly both a 2020
Intel MacBook Pro and 64-bit W10 Pro. PC. :(

Thank you for reading and hopefully answering soon. :)
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On Fri, 26 Jul 2024 15:35:49 +0000, ant@zimage.comANT (Ant) wrote:

>I have 2 SanDisk GB flash drives (256 GB with USB-A & USB-C ends, and
>512 GB with old USB-A). They both get burning hot quickly both a 2020
>Intel MacBook Pro and 64-bit W10 Pro. PC. :(
>
>Thank you for reading and hopefully answering soon. :)

I use 128 GB pendrives for backups.
Yes, very hot.
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Ant <ant@zimage.comANT> wrote:

> I have 2 SanDisk GB flash drives (256 GB with USB-A & USB-C ends, and
> 512 GB with old USB-A). They both get burning hot quickly both a 2020
> Intel MacBook Pro and 64-bit W10 Pro. PC. :(

No mention if you are doing long write sessions, just reading from the
drive, or it's hot sitting idle (no reads or writes). If hot when idle
(and allowing a cool-down after a long write session) then the device is
defective, so start a return with Sandisk.

Many have plastic cases which feel less hot, but are just as hot. Has
to do with density of the shell as to how fast is the thermal transfer.
A metal shell will dissipate heat faster, so a plastic shell transfers
slower which can eventually fry the device. That's why plastic
heatsinks are not used on CPUs or GPUs.

The efficiency, write speed, the duration of writes, and case materials
affect the heat of a USB flash drive. During a long write session when
the device is constantly drawing more power, even a constantly blinking
LED adds some heat. Some users, for example, of the Sandisk Ultra Fit
3.0 USB flash drive note it gets very hot, but often never mention how
long was the write session or how many bits were transferred. Although
it is a flush-fit USB drive (just the short head is outside the USB
connector), its shell is plastic over metal (one version just has
metal), but the plastic is very thin (okay for semi-permanent use, but
too flimsy for repeated insertions), so it can feel hot on the fingers
when extracting. Sandisk's response is to wait 30 seconds after a long
write session to let the drive cool down -- which is admission their
flash drive gets really hot.

We don't know for sure what USB flash drive you have, just that it's
Sandisk. Could be it is a fast device (high write speed), and you're
doing long write sessions. A slower driver would generate less heat,
but who wants slower? Well, a lot of users just base their buying
decision on capacity, and never read the specs, if available, on the
write speed of the drive. However, some users want fast USB drives, so
they get those with the fastest write speeds. Usually takes one huge
copy operation where the user keeps perturbed at how long it takes to
realize they need to get a fast drive instead of a cheapy slow one.

We don't know what type of USB drive you have (USB 1.1, 2.0, 3.x). The
higher the USB spec support, the higher the maximum current draw. The
higher the current load, the more heat gets generated.

Remember that hot to your fingers is not hot to a connector. USB
temperatures may range from -20C to 80C. Well, 80C (176F) is damn hot
on your fingers. 5-minute exposure to 120F water causes 3rd degree
burns. If you use a monitor program, you'll probably see your CPU might
run up to 50C (122F) or up to 80C (176F) when gaming, and that would be
painfully uncomfortable and even damaging to hold in your palm.

Just how hot is "burning hot"? Do you smell burning plastic? Does
paper ignite when you press it against the hot USB drive? Did you
measure with an IR thermometer to know just how hot is hot?

To get opinions or experiences from other Sandisk consumers, you might
want to ask in their forums (https://forums.sandisk.com/). Include the
model, and just HOW you are using the drive when it gets hot.

FYI. https://www.amazon.com/SanDisk-256GB-Ultra-Drive-Type-C/dp/B06XC1WGQR/ is the one I have for 256 GB.

In comp.sys.ibm.pc.hardware.storage Ant <ant@zimage.comant> wrote:
> I have 2 SanDisk GB flash drives (256 GB with USB-A & USB-C ends, and
> 512 GB with old USB-A). They both get burning hot quickly both a 2020
> Intel MacBook Pro and 64-bit W10 Pro. PC. :(

> Thank you for reading and hopefully answering soon. :)

--
"Do not bring a detestable thing into your house or you, like it, will be set apart for destruction. Utterly abhor and detest it, for it is set apart for destruction." ???Deuteronomy 7:26. Hot, SDCC, Olympics, & DP&W!
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Ant <ant@zimage.comANT> wrote:

> FYI. https://www.amazon.com/SanDisk-256GB-Ultra-Drive-Type-C/dp/B06XC1WGQR/ is the one I have for 256 GB.

With the plastic shroud around the PCB inside, doesn't seem the
electronics are going to get much cooling. There looks to be an open
slot on the top of the shell where you use a tang to extend/retract the
connector, but is there a slot or holes on the bottom to, at least,
provide for convection cooling (airflow through the shell)?

https://m.media-amazon.com/images/I/61AnmPoZOwL._AC_UF1000,1000_QL80_.jpg

I can't tell if those are holes in the shell opposite the slider side,
or maybe lenses for LEDs to show through.

Western Digital owns Sandisk. The product page is at:

https://www.westerndigital.com/products/usb-flash-drives/sandisk-ultra-dual-drive-m30-usb-3-1-type-c?sku=SDDDC2-256G-G46

The reviews there are less than glowing. Its specs specify:

Operating temperature range: –10° – 70°C (14° – 158°F)

Well, 158F is going to feel hot on your fingers, but it's not hot to the
connector in the computer case. I mentioned the Sandisk forums to see
what other users of the same product might say about temperature. One I
found was:

https://forums.sandisk.com/t/sandisk-ultra-luxe-256gb-extreme-heat/225662

"after removing it from my TV after watching a movie" makes it sound
like the drive was only getting read, not written. Getting really hot
with only reads seems a defect. Hot on sustained writes would be
normal.

As the forum thread mentions, if you are worried about the heat damaging
the USB connector in a laptop, tablet, desktop, or whatever, use a USB
stub cable to move the USB drive away from the computer case; however,
you'll probably want to either have the USB drive dangling in mid-air
from the case USB connector, or lay it on something that can absorb the
heat, like a ceramic or stone coaster.

In comp.sys.mac.hardware.storage VanguardLH <V@nguard.lh> wrote:
> Ant <ant@zimage.comANT> wrote:

> > FYI. https://www.amazon.com/SanDisk-256GB-Ultra-Drive-Type-C/dp/B06XC1WGQR/ is the one I have for 256 GB.

> With the plastic shroud around the PCB inside, doesn't seem the
> electronics are going to get much cooling. There looks to be an open
> slot on the top of the shell where you use a tang to extend/retract the
> connector, but is there a slot or holes on the bottom to, at least,
> provide for convection cooling (airflow through the shell)?

> https://m.media-amazon.com/images/I/61AnmPoZOwL._AC_UF1000,1000_QL80_.jpg

> I can't tell if those are holes in the shell opposite the slider side,
> or maybe lenses for LEDs to show through.

No lights. Holes are for string to secure when carrying like a lanyard?

> Western Digital owns Sandisk. The product page is at:

> https://www.westerndigital.com/products/usb-flash-drives/sandisk-ultra-dual-drive-m30-usb-3-1-type-c?sku=SDDDC2-256G-G46

> The reviews there are less than glowing. Its specs specify:

> Operating temperature range: ???10° ??? 70°C (14° ??? 158°F)

> Well, 158F is going to feel hot on your fingers, but it's not hot to the
> connector in the computer case. I mentioned the Sandisk forums to see
> what other users of the same product might say about temperature. One I
> found was:

> https://forums.sandisk.com/t/sandisk-ultra-luxe-256gb-extreme-heat/225662

> "after removing it from my TV after watching a movie" makes it sound
> like the drive was only getting read, not written. Getting really hot
> with only reads seems a defect. Hot on sustained writes would be
> normal.

Yeah, even idled!

> As the forum thread mentions, if you are worried about the heat damaging
> the USB connector in a laptop, tablet, desktop, or whatever, use a USB
> stub cable to move the USB drive away from the computer case; however,
> you'll probably want to either have the USB drive dangling in mid-air
> from the case USB connector, or lay it on something that can absorb the
> heat, like a ceramic or stone coaster.

More like burning hot to touch! :(
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