@Wizard thanks, I got the parameter list for configuration file, but it does not show me which parameter is being used for store file system, I've read in Statck overflow Answer that we could configure parameter in config file, *data_dir* to change the storage location of files, but doesn't work and that parameter is does not avail. in documentation too, where actully there parameter to be configure?

look at this = https://www.odoo.com/de_DE/forum/hilfe-1/question/where-are-document-attachments-stored-529