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Post mount.
In that case, either G01S(resin) or G04S (metal), double check your rotor wear on top to ensure that there's no "lips" between the braking surface and non-braking surface, the disc rotor should said "metal" or "resin only" to allow you to choose which pads to go for.
Don't forget to spread out the old pads with a flat headed screw driver to "reset" the piston for the new pads otherwise the rotor will be a tight squeeze (if you have to spread it out with the new pads, use a cloth on the screwdriver and carefully pry it open).
Standard pads.
If you want more power, go for metal pads instead of resin and last longer, but they're more on/off and wear rotor out sooner than later.
Honestly, even the shittest disc pads outshine the best rims pads, just get either Shimano K02S (resin) or K04S* (metal).
*please be sure that the rotor is compatible with metal pads, also these pads are compatible with the RS505 flat mount calipers which I presumed you have.