In real-world, common usage, the max is Here is why:. The maximum Windows filename length to the operating system is characters, however that includes a number of required characters that lower the effective number. So, that takes the down to characters as an absolute maximum.
That would be the case only if you had a very long filename with no extension and it was located on the root folder of the disk. Looking at more common and realistic scenarios, your effective maximum is going to be significantly lower.
Add an extension very common , and your maximum length drops to or characters, depending on the length of the extension most are 3 characters; some are 4 - e. Each directory name in the path of the filename must be included in that characters.
This is why errors sometimes occur when moving files between directories. Users are often confused by the "filename too long" message when they see a short filename. The reason for the error is the total path length must conform to the filename maximum length. Windows makes no distinction in filename storage between the path and filenames. They are stored in the same space. Linux OTOH, does make a distinction. On a Linux O.
That is how you should be thinking of filename length in Windows - as path length and not file name length. Since there is no way to know how long the path of the directory your file is in, I can't give you a firm answer. Do your files all have extensions? I don't know that either. If you will not know ahead of time if the file has an extension name or not, presume it will use up 5 characters for an extension and that will lower your path max to If the files won't be stored in the root disk folder, make sure you allow room for the directory path names and backslash characters that separate each directory name.
That will take you down to and probably lower. This process is one of many reasons why Windows architecture is antiquated - even in Windows Office Office Exchange Server. Not an IT pro? Office Office Exchange Server.
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