@MakisFil Actually no, all REs are meant to be positioned indoor. You can place these on a porch or other open space but I would not recommend exposing them to a direct sunlight or rain.

@StouffvilleSMI Unfortunatelly there's no any ETA for different models regarding this feature.

@StouffvilleSMI Check this post.

@ThePour In a double NAT scenario like yours the NAS would be visible only to devices connected to Deco network. Despite that you could still port-forward services that are configured on the NAS on...

@MakisFil All three models would do the job for you. You should keep in mind that first two (RE315, RE450) are dual-band extenders and TL-WA860RE is a single-band (2.4 GHz only). From these three I...

@MakisFil There are no outdoor extender/repeaters in the TP-Link portfolio. Apart from that you could use any of the TP-Link extenders available on the market.