GCODE on the USB drive is corrupt. Fix Manually before resuming.
How would I go about fixing manually when I get "GCODE on the USB drive is corrupt. Fix Manually before resuming." I'm pretty sure my USB drive is in good shape and properly formatted
When someone asks you if you're a god, you say, "YES!"
RE: GCODE on the USB drive is corrupt. Fix Manually before resuming.
IIRC, PrusaSlicer now creates binary gcode by default but there is an option to create text gcode. Maybe that setting got changed by mistake? I believe the printer requires a relatively recent version of firmware to recognize binary gcode. What firmware version is on your printer?
2022 - Creality Ender 3 V2
2024 - Prusa MK4S/MMU3
2026 - Bambu P2S/AMS2Pro
2028 - Liquid CMY for billions of colors?
RE: GCODE on the USB drive is corrupt. Fix Manually before resuming.
It was originally a MK4, upgraded to a Mk4s, it can normally handle bgcode. This is like maybe one file in 20.
When someone asks you if you're a god, you say, "YES!"
By now it's too late. Once the printer has cooled resuming is unlikely to work.
The only easy fix is to re-save the file onto the USB. If you forget to eject the USB correctly from your computer you can have an incomplete file, likewise if there is a network error when transferring the file remotely.
If you can replace the file with a complete one of the same name before the printer cools the resuming often works.
Cheerio,
RE: GCODE on the USB drive is corrupt. Fix Manually before resuming.
I had the same error and the printer sat for about 50 minutes before I saw it. Bet maintained temp at 60deg, nozzle cooled to 32.5deg. I replaced the file, verified the copy, replaced the drive, and clicked continue. The printer reloaded the file, and began heating the nozzle. Once it was back to temp - it resumed printing.
Using a Prusa MK4 on firmware 6.2.4+8909 (incase this is something they have addressed since you last had this happen).
RE: GCODE on the USB drive is corrupt. Fix Manually before resuming.
In my case, after trying everything I could, the only thing that actually got rid of this issue was to disable the generation of binary gcode in PrusaSlicer.
I use a Prusa Mini+. Everything is up to date, Slicer, printer firmware ... and binary gcode simply crashes the printer with this error and nothing else has any effect.
RE: GCODE on the USB drive is corrupt. Fix Manually before resuming.
Are you really still get this error in 2026 ? 😲
This was an old thread for the MK4 and it was solved with:
- Binary GCODE support in PrusaSlicer
- FW upgrade that handled the file integrity transmission on the printer
You should enable the binary gcode in Prusa Slicer.
When you send a print, if the file arrives corrupted to the printer, you get immediate notification and the print does not start at all.
Then you can just resend it to the printer until the printer receives it correctly.
This is a rare situation: I got this error not more than 3 time in years, but the corrupted file was never printed.
Different story if you user OrcaSlicer and send non binary ASCII file to the printer...😎
RE: GCODE on the USB drive is corrupt. Fix Manually before resuming.
I did see this recently on my mk4s with bgcode and the latest slicer and firmware. Died at 98% complete. I’ve recovered before by physically moving the memory stick to my computer and overwriting the bgcode with from PrusaSlicer, then reinstalling the stick in the printer and continuing.
flash memory can get squirrelly, it should probably be computing a SHA and verifying that. (I’m assuming it doesn’t currently…)
When someone asks you if you're a god, you say, "YES!"