JMS583 chip

 

 

(QUMOX 256Go)
it depends on the SSD if the transfer rate is constant or not

So if it works, doesn't it matter that I passed firmware 0209 first and then 20.05.00.01?I don't wish I ruined the enclosure

No need to update, rather check the USB 3.2 connection if it is in USB 3.2, I will rather think where the problem is
I will show you if necessary how to check if the port where the Nvme / USB box is connected is in USB 3.2 

Yes but now I have already updated twice as previously written. What do I do now? Do I need to downgrade?

 

Check your port if it is USB 3.2 to be able to take advantage of the fastest transfer rate