The function creates a folder in the Files directory (depending on the value of common_flag).
[in] The name of the directory you want to create. Contains the full path to the folder.
[in] Flag determining the location of the directory. If common_flag=FILE_COMMON, then the directory is in the shared folder for all client terminals \Terminal\Common\Files. Otherwise, the directory is in a local folder (MQL5\Files or MQL5\Tester\Files in case of testing).
Returns true if successful, otherwise - false.
For security reasons, work with files is strictly controlled in the MQL5 language. Files with which file operations are conducted using MQL5 means, cannot be outside the file sandbox.