Printing issues

[doctoratlantis]

Have you updated the printer firmware? You must have or better for it to recognize the new .ctb file compression algorithm used in CB v1.9.0.

Press the "System" button on the printer's main menu to check the firmware version...

I got this email from elegoo. No idea why this should need to happen out of the box and not sure what they mean when they say print 4 files - no idea what that means?

Dear customer
I am sorry to reply late.
Yes,The printer can only read "ctb" format so I guess you need to update your machine.
Copy the attached file to the root directory of the U disk, then restart the printer, the machine will automatically update the “SH4 ”file, and then you need to  print the remaining 4 files
Best Regards