Upside-down Character - Rename, Copy Errors

I'm trying to copy a partition of my hard drive over to an external drive so that I can format that drive and delete the partition.

I've run into a file that I cannot copy, move, rename, The file originally had the character in it, but I think sometime in one of the transfers of the file, it lost the character and it got replaced with an upside-down "T". This file was saved in different versions under the same name in two different folders and the same errors have occurred with both"

"Cannot copy file: Cannot read from the source file or disk" and in DOS:"The filename, directory name, or volume label syntax is incorrect."