Ethernet Port link aggregation

To be more specific, for your setup, I would recommend the following.

• Enable Ethernet port aggregation on the RAX200 and connect ports 1 and 2 to the 2 Ehternet ports on the NAS (having its Ethernet aggregation enabled as well) (usually the "new bond" setting in the network settings tab of the readyNAS and it will need to bond using layer 2+3). Many ReadyNAS devices will not auto detect a link aggregation, thus it has to be enabled in the network settings, otherwise it will just use one or the other port but never both at once.
• Using either Ethernet port 3 or 4 of the router, connect it to your 16 port gigabit switch.
• For the multi-gig port, check if your main PC has a 2.5GbE or better Ethernet port, if not, then buy a NIC such as an RTL8125 based one, the prices fluctuate a lot, but on a good week, you can find some in the $12-15 range, and on a bad week, they can be in the $25 range). You will then connect the multi-gig port to your main PC so that it will have the full 2Gbps from the NAS when performing backups and other transfers.
• For your WiFi clients, your main laptop should have a good 802.11ax WiFi adapter, if needed, upgrade to an Intel AX200 WiFi adapter (typically around $17-$19), of it you want to eventually move to the 6GHz band, then the Intel AX210 which will go for about $25-$30. If in the same room as the router on the 5GHz band, you will get around 1.8Gbps real world throughput, and often depending on the building materials and room size, you can still hold over 1Gbps even 1-2 rooms away.