What is a BAK1 File Type?
All BAK1 files have a compound file extension. It is added to a file for which it stores information. If, for example, the file stores backup information for a PLAYER file, the file name will be ab 07704dbcb4162646d4d93bbeef34df.player.bak1.
You can delete the file " " l' extension from the file name and open the file as a PLAYER file in Starbound. It is important, however, that you do not change the string before the extensions.
The BAK1 files are located in the player " directory in the Starbound directory. For example if you purchased Starbound through Steam, the BAK1 files are stored in the following location in Windows:
Program Records / Steam / SteamApps / Common / Starbound / Player.
It also uses .BAK2 and .BAK3 files.