This indicates the NSP file is compressed in a RAR archive. You will need a tool like WinRAR or 7-Zip to extract the actual .nsp file before use. Usage and Installation
v65536 refers to the internal version numbering, typically indicating the first major update (often listed as v1.0.1 in the system menu). Region: [US] denotes the North American release. File Details Download [01007960049A0800][v65536][US] nsp rar
This is a digital distribution format used by Nintendo for the eShop. In the homebrew community, NSP files are used to install games or updates to a modified console's SD card. This indicates the NSP file is compressed in a RAR archive