FPR1010 File Permission error when copying

[Steve Bellan]

we bricked an FPR1010. Booted into ROMMON and then used a FAT32 formatted USB to boot to 7.4.2. I simply want to get the file from the USB to the flash. I get this permissions error. FXOS troubleshoot guide is no help 

[ccieexpert]

have you tried this procedure here to reimage:

https://www.cisco.com/c/en/us/support/docs/security/firepower-1000-series/220642-reimage-a-secure-firewall-threat-defense.html

[MHM Cisco World]

from cisco doc.

Caution: ROMMON Mode supports TFTP protocol and USB. FTP, SCP, and SFTP are not supported on the initial boot up process.