The best way to solve long path problems is shortening a few folder names.
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How to fix the "File Path Too Long" error Once a path has exceeded the maximum length, Windows Explorer can no longer access it. Long paths are often created accidentally, for example if a volume is integrated into a Distributed File System (DFS) tree or a top-level folder get a longer name. TreeSize of course fully supports long paths. Although Windows 1603 (Anniversary update) allows turning off this limitation, this option is not enabled by default as many applications still do not work properly with long paths. This limitation is a remnant of MS DOS and has been kept for reasons of compatibility. While Windows' standard file system (NTFS) supports paths up to 65,535 characters, Windows imposes a maximum path length of 255 characters (without drive letter), the value of the constant MAX_PATH. Net Framework and Windows itself have major issues with paths that have 260 or more characters, the result is that typically files in long paths cannot be used. Im sharing the output we were able to achieve using AlphaFS. AlphaFS supports both long paths as well as the functionalities provided by System.IO library. But if you don’t have enough permissions to update the group policy then use the below solution. "File Path Too Long" is a frequently encountered error especially on enterprise storage. After successful group update, WMI or System.IO libraries work for long paths too. The fully qualified file name must be less than 260 characters, and the directory name must be less than 248 characters. SmartPOP2Exchange versus Exchange Server Toolbox The specified path, file name, or both are too long.