There are a couple of Cudy devices with related names.
WR3000:
- 256MB RAM
- 16MB Flash
- 4 Ports 1Gbit
- The cheapest, they sometimes go for 37€ on Amazon here in de
- https://openwrt.org/toh/hwdata/cudy/cudy_wr3000_v1
- https://www.amazon.com/dp/B0BRK3CYY3/
WR3000S:
- 256MB RAM
- 128MB Flash
- 5 Ports 1Gbit
- A little bit more expensive, but still cheap: Usually around 46€, sometimes 42€
- https://openwrt.org/toh/hwdata/cudy/cudy_wr3000s_v1
- https://www.amazon.com/dp/B0CYT3Q54S/
WR3000H:
- 256MB RAM
- 128MB Flash
- 1 Port 2.5GBit + 4 Ports 1GBit
- The most expensive, but generally speaking still a good deal: Usually 60€, sometimes around 50.
- https://openwrt.org/toh/hwdata/cudy/cudy_wr3000h_1
- https://www.amazon.com/dp/B0CYT61NFZ/
They all do work, and I'm perfectly happy with my WR3000 ones, but given I could have gotten much more storage and a 2.5GBit port for just 15€ more, I guess you see why people tend to correct the specific names.
You see, Amazon US has the 128MBit storage one for the price Walmart only gets you the 16MBit storage one, and for additional $10 you get the 2.5GBit port.