Notifications
Clear all

MK4S USB issues  

  RSS
MichalSz
(@michalsz)
Member
MK4S USB issues

Hi folks, I am wondering if anyone experienced similar issues:

my MK4S (FW 6.1.4) for some reason stopped reading usb drives. Flash drive that was originally plugged into the printer is not readable on my Mac/PC. New FAT formatted drive is not readable by PRUSA. Following steps from PRUSA helpdesk I checked wires, USB socket etc. They decided to send me a new LCD. When it arrived I swapped the original one with the new one and everything was fine for about a week. Now same story has happened. Printer stopped reading USB drives (any). The original USB which was shipped along with new (replacement) LCD from PRUSA is not readable on my computers. I use Prusa Connect (I send files directly from the Prusa slicer ob my Mac to Prusa connect) so I didn’t touch USB since I had a new LCD installed. I am super confused and disappointed with my new printer. Any ideas?

many thanks. 
Michael

Posted : 08/02/2025 9:32 pm
ZdeX
 ZdeX
(@zdex)
Member
RE: MK4S USB issues

Hi Michael,

I had similar problem now. Files from original Prusa USB drive disappeared and the drive was not writeable for the printer.

On my Mac it was not readable. So I have formatted it as MS-DOS (FAT) and now it works again. I have also copied newer FW 6.2.0 and updated it successfully.

Posted : 12/02/2025 11:53 am
chmax
(@chmax)
Trusted Member
RE: MK4S USB issues

This may be a different problem: the prusa mem sticks are known for ceasing to work. I had multiple problems like files disappearing, complete blank content, etc I did buy a decent quality memory stick and since then no problems anymore. If the display doesn't read ANY memory stick anymore, sounds more like a fried electronics. Do you experience static discharges when you touch the printer? In winter it happens a lot in dry air...

I get zapped all the times so I started touching metal frames before going near the my printer...

Posted : 12/02/2025 2:48 pm
bowtie6 liked
Share: