ReiNX Atmosphere SX OS
R4S dongle firmware Download
(UF2 File)
https://bit.ly/2MYGNMv https://bit.ly/2OOH0T8 https://bit.ly/2MzDGgV
MANUAL:
  ReiNX Atmosphere
Custom firmware Download  https://bit.ly/2nNQO4f For switch 4.x
https://bit.ly/2PlXaUL
For switch 5.x 
https://bit.ly/2Mm2gmq
For more switch verson, please refer to the manual.
Convert software (for PC)
convert XCI into NSP file format
4NXCI XCI2TitleConverter2.0
MANUAL
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