Yes, my samples load with no extraneous files on the USB drive.
We have isolated the issue! It appears that an extra file on your USB drive was causing the issue. If you have any custom instrument files or third party firmware that were previously on the USB drive, make sure to troubleshoot each individually to find which file is the culprit. This can be done either by attempting to load each file individually onto Nebulae, or troubleshooting via your computer to ensure no issues were created when compiling/exporting your file.
If the affected file is a Qu-Bit supported file, and you pulled the file from our official Nebulae v2 repository, please let us know via our contact form so that we can investigate the issue further.