that metal case is act as heatsink for those nand chip and its controller.
actually its a good thing for it to warm up as your device will have longer longevity.

most of the time, it just warm (on the high side), not going to burn your finger off.
calm down. the main purpose why this metal drive were introduced were because some user plug their flash drive 24/7, so like it or not the heat need to be manage so it could at least lasts longer than warranty period

if you want plastic case, i suggest SanDisk Ultra USB 3.0
https://shop.sandisk.com/en-ap/products/usb...SDCZ48-512G-Z35

with a plastic casing drive, dont expect anything ultra high speed (like 400MB/s read speed), it is not feasible.

This post has been edited by zerorating: Oct 6 2025, 01:46 PM