DeleteFile deletes a file from the disk and returns an error filePath is the path to the file.

GetFile returns a file from the disk filePath is the path to the file.

GetFiles returns a list of files in a directory basePath is the path to the directory.

SaveFile saves a file to the disk and returns the file path and an error file is a pointer to a multipart.FileHeader basePath is the path where the file will be saved.