**Describe the bug** It appears to be a bug in gulark's **filesystem::canonical** which fails to properly resolve relative path to a mapped drive. C++17 **std::filesystem::canonical** doesn't have this issue and properly resolves the relative path. In this scenario **C:\\MOUNT_ME** is a folder that is mapped to a folder on an external hard drive `G:\RTS` on Windows: ``` Plugin and external drive or USB Drive to your computer. Go to Disk Manager. Right Click on your connected drive. Select "Change Drive Letter and Path..." Select "Add". Use "Mount in the following empty NTFS folder:" Locate the folder you want to mount to. ``` **ghc::filesystem::canonical** ``` auto fullPath = ghc::filesystem::path(currentFileDir).append(relativeFilePath); // C:\\MOUNT_ME\\RTS\\RTS\\master_files\\..\\referenced_files\\USD\\barrelTests\\Library\\Assets\\Barrels\\Barrels.usd auto path = ghc::filesystem::canonical(fullPath, errorCode); // error ``` **std::filesystem::canonical** ``` auto fullPath = std::filesystem::path(currentFileDir).append(relativeFilePath); //"C:\\MOUNT_ME\\RTS\\RTS\\master_files\\../referenced_files/USD/barrelTests/Library/Assets/Barrels/Barrels.usd" auto path = std::filesystem::canonical(fullPath, errorCode); // Ok, good ``` **Expected behavior** ghc::filesystem::canonical should behave similar to std::filesystem::canonical. **Additional context** https://github.com/Autodesk/maya-usd/pull/1422