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XL will not read exfat formated USB  

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Bob Ruff
(@bob-ruff)
Member
XL will not read exfat formated USB

Tried to print some gcode files (Pruseslicer) I copied to a new Samsung 158GB USB flash drive. The XL would not open it. Checked on my computer the files were there. What is going on? I'm I missing something?

Posted : 11/08/2023 10:16 pm
Graeme
(@graeme)
Active Member
RE: XL will not read exfat formated USB

Similar discovery. I had a stubby Samsung drive that I thought would be ideal as less chance to bump.... Seems only fat32.

I then reformatted it to fat32 specifically for the XL, it recognised it and I had some success; I'm using Prusa Link/Connect to wirelessly transfer but the results were really erratic so have moved back to a native fat32 usb and resolved.

Posted : 12/08/2023 12:20 am
jvasileff
(@jvasileff)
Trusted Member
RE: XL will not read exfat formated USB

That's right - exFAT is not supported. https://help.prusa3d.com/article/sd-cards-and-usb-drives_112291

It would be nice though if the printer would report an error rather than showing and empty drive.

Posted : 12/08/2023 1:14 am
Neophyl
(@neophyl)
Illustrious Member
RE: XL will not read exfat formated USB

None of the buddy based printer do. GitHub issue here https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/3011  it seems the devs are using the tiny usb library for usb support. Which does not support exfat. 

Posted : 12/08/2023 7:09 am
Holck
(@holck)
Eminent Member
RE: XL will not read exfat formated USB

Im no expert...just glancing, but tinyusb does seems to use FatFs as the filesystem module, as does the Buddy code: https://github.com/hathach/tinyusb/blob/master/lib/fatfs/source/ff.c
and
https://github.com/prusa3d/Prusa-Firmware-Buddy/blob/master/src/buddy/filesystem_fatfs.c

FatFs does support exFAT: http://elm-chan.org/fsw/ff/00index_e.html

Its enabled in the config code of the project by setting FF_FS_EXFAT to 1
http://elm-chan.org/fsw/ff/doc/config.html#fs_exfat

Enabling exFAT does seem to require you modify your filename code

Posted : 26/08/2023 7:35 pm
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