You cannot open this file with standard Windows tools. To view or modify its contents, you must use specialized software:
The naming convention of the x64 series reveals its purpose. Files like x64a.rpf , x64b.rpf , x64c.rpf , and so on contain the core game assets specific to 64-bit architecture (hence the "x64" prefix). The letter suffix (a, b, c, d, e, f) indicates a categorical split. x64f.rpf
Working with x64f.rpf files can be challenging due to: You cannot open this file with standard Windows tools
