can't boot a Mint Cin 17.1 live Sandisk Ultra Fit 3.0 32GB

What does this mean?

  1. I can boot with the sandisk usb ultrafit 3.0 into linux on other computers.

  2. On the computer I want to boot, this usb fails.

  3. (some) other, non sandisks succeed in booting on this computer.

The message I get is:

(initramfs) Unable to find a medium containg a live file system".

When I have another usb also with a linux live image on it in another slot and try to boot from the sandisk, i get:

(initramfs) FAT-fs (sdc1): unable to read inode block for updating (i_pos 132651)

The computer in question is a chromebook, with a haswell cpu (celeron 2995U)

I tried the taking out and typing exit, i get a lot of script on t he screen with ‘end trace’ at the end of it.