Where, specifically, are you seeing that error message? Is it an error message that the Finder is throwing? Or is it an error message that the TomTom program is throwing?
Depending on what application, specifically, is throwing the error would determine what that error code means. If the Finder is erroring and reporting -8058, that could mean one problem, while if the TomTom software is erroring and reporting -8058, that could mean a completely different problem.