The 201 file is a record also known as the OMPF or Official Military Personnel File. It is a folder of documents maintained by the military for each Service Member. It contains the following documents:
The 201 file is a record of your military service and contains documents that are important for proving your military service. It is fairly common for the military to lose or misplace your 201 file or pieces of it, therefore it is very important that you maintain copies of your 201 file and everything in it. You can request copies of your 201 file, but this will cost you betwen $15 and $50.
Wait... Why is my DD 214 Important?