Sync 3 / Sync3 upgrade fails , displays error INSTL_ERR01 - workaround below.

Updating Sync 3 from 2.0 and 2.1 to 3.0 fails with above error message. Install instructions say to use a 32 GB or higher USB flashdrive. In my case, I was using a 64 gb flash drive which would fail the upgrade as above. Next I tried a 128 gb flashdrive, same failure. I repeated a few times. I also validated the drive was working fine.
The resolution for me was to use a 16 gb USB flashdrive, make sure it is formatted with Fat32 only, copy the files and rerun the installation. Since I did not have a 32 gb drive I could not test it, but it certainly failed with 64 and 128 gb drives.

I am unclear of the reason why, but I suspect that there is a bug using USB drives > 32 gb in size, or with the filesystem type, or the combination of the two. Many operating systems have bugs dealing with filesystems or address ranges greater than 32 gb, or possibly the bug is limited to the installer. The 3.0 upgrade is less than 4 gb in size, so it fits comfortably on a 16 gb flashdrive. I can see that the base firmware / OS seems to be some derivative of Linux, possibly Android, but can read a Windows style filesystems, so this combo may have bug.