Upload File for Master Data

Dear Members
still most of erpnext users suffering from uploading file using alot of them tried it and still failing to uplad data through this file, i noticed that there is no clear error messages to fix the issue and re-uploaad file again
i suggest to record comperhensive video about this issue because there is no any videoes in erpnext channel on youtube about this issues

Can you be more clear as to what you mean by Upload File? Are you talking about attaching files, or the Data Import tool? The user docs have a comprehensive explanation of how to do data import.

sorry for unclear post, i mean data imprtant tool
can you please share with me some these comperhensive documents