You can use Teracopy to copy folders / files with verification after copy. It produces checksums of the source and destination files that can optionally get saved to disk. You can also use Teracopy to validate these saved checksums. Another (freeware) utility that you can use to produce / verify checksums on individual folders / files is Md5Checker. Source: 6 months ago

Test everything by eliminating all the possible reasons. First, test SD card with something like h2testw program without the adapter. Second, test CF-SD adapter with the same card via CF card reader. Third, sync only small portion of tracks, like 50-100, and check if sync was successful. Fourth, select one of the tracks in iPod_Control\Music hidden folder on iPod and compare it to the original in your library with... Source: over 1 year ago

If you've done everything according to the wiki (bios file names are case sensitive and should only need to go inside the \BIOS\ folder), take a look at the official core documentation here you can find the checksum values for the correct Bios and use an app like MD5Checker to verify. Source: almost 2 years ago

I’m sure there are dozen more of apps but some of the few I use: Md5Checker, Teracopy (which also copies with verification) and checkpoint. Source: about 2 years ago

Here is possible that your download was corrupted. Download Md5Checker from http://getmd5checker.com/. Check iso file with it. Md5 checksum should be: c64cdf16381323980ec6a3f37b8b8087. If different you have bad file. If is the same then boot in windows safe mode + disable antivirus (defender) + run setup as admin. Source: over 2 years ago

Try this recovery tool https://recoverytoolbox.com/cd.html. Source: about 2 years ago