Where would I get the best bang for my bucks?

[TruffleShuffle]

Here's my current system :

CPU: Intel Core i5-13600K 3.5 GHz 14-Core Processor
CPU Cooler: ARCTIC Liquid Freezer II 120 56.3 CFM Liquid CPU Cooler
Motherboard: MSI PRO Z690-A WIFI ATX LGA1700 Motherboard
Memory: Corsair Vengeance 32 GB (2 x 16 GB) DDR5-5600 CL36 Memory
Storage: OCZ Agility 3 256 GB 2.5" Solid State Drive
Storage: Crucial MX300 750 GB 2.5" Solid State Drive
Storage: Crucial MX500 1 TB 2.5" Solid State Drive
Storage: Western Digital Blue SN570 2 TB M.2-2280 PCIe 3.0 X4 NVME Solid State Drive
Video Card: Gigabyte GAMING OC GeForce RTX 3070 8 GB Video Card
Operating System: Microsoft Windows 11 Home OEM - DVD 64-bit
Monitor: MSI Optix MAG274QRF-QD 27.0" 2560 x 1440 165 Hz Monitor

What would be the best thing for me to upgrade? I've emboldened the HDD to show which is the main drive, the rest are just old storage drives.

 

[TruffleShuffle]

Damn i was really hoping someone wouldnt say GFX card

As for those drives? My life is in them! Each time i upgrade i copy it all onto the new drive but then its like....well its still working, i'll just leave it there as a backup.