Problem with USB key

[Zacki2]

Hello,

QLVideo works perfectly fine on my Macbook Pro but when i use usb keys or external hard-drive, i have some issues. I have some movies and all my pictures on my external hard-drive and on each movie (in mkv) i have a thumbnail. On my usb key, i also have some movies.
The first time i put my usb key and my external hard-drive on my Macbook, all was fine and i could saw all my mkv files with the correct thumbnails.
But after, i opened my pictures to see them and i added some more pictures on my external hard drive and now, i have an issue : the thumbnails of some of mkv files are not my original thumbnails (the covers of movies) but my personal pictures instead :/ And this happen only when i read the files with this option on the finder :

https://nsa40.casimages.com/img/2021/06/12/210612103154908490.png

when i use the 3 other, i don't have the issue :

https://nsa40.casimages.com/img/2021/06/12/210612103154826731.png

and i only have the issue with usb keys or external hard-drive. My thumbnails never changed on the mkv files i have on my computer.

And when i have my external hard-drive (where are my pictures) disconnect from my computer, i still see thumbnails of my pictures on my mkv files which are on my usb key. Even if i turn off my Mac and turn on again.

I removed QLVideo and installed it again, and all was back to normal. I could see the right thumbnails for each files. But the problem start again after i read some pictures ...

Any help ?

Also, i hope people understand what i'm saying because english is not my former language.

[Marginal]

Sorry for the late reply. Sounds like QuickLook is not realising that your removable devices are different from each other. Do you still have this issue?