Storage Drive SSD ideal read/write speed

I work in Premier Pro and After Effects frequently and I get frequent crashes and very slow previews and renders.  I suspect it is my storage drive that is the bottleneck and I'm looking to upgrade that.  I'd like to get opinions of the community on what I should be looking for to optimize price to performance ratio.

Current specs:

SSD M.2 500GB - for OS

SSD M.2 500GB - for Scratch Disk

HDD 2TB for storage (this is where I store my media and project files)

GeForce RTX 3070 8GB graphics card

AMD Ryzen 9 5900x (12-core) 4.8 GHz Turbo processor

Mother board - ASUS Prime x570-P

The HDD storage drive, I think, is the most likely suspect for  the bottleneck I'm experienceing.  So my quesitons are:

1) Am I correct in thinking adding an SSD to store media and project files for PP and AE would make a performance difference.

2) If So, what specs on the SSD would be most beneficial?  It seems I can get 560/530 MB/s read/write speeds with large storage volume for around $400 (https://www.amazon.com/SAMSUNG-870-QVO-SATA-MZ-77Q8T0B/dp/B089C3TZL9?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&psc=1&smid=ATVPDKIKX0DER).  I can get much faster read/write speeds 6500/3500MB/s for around $600 (https://www.newegg.com/samsung-pm9a3-7-68tb/p/2U3-0005-000J8?item=9SIBFJRJCC0742&nm_mc=knc-googleadwords&cm_mmc=knc-googleadwords-_-solid%20state%20disk%20-%20enterprise-_-samsung-_-9SIBFJRJCC0742&utm_source=google&utm_medium=organic+shopping&utm_campaign=knc-googleadwords-_-solid%20state%20disk%20-%20enterprise-_-samsung-_-9SIBFJRJCC0742&source=region&srsltid=AR57-fAcHicHk7tZ6jlMebSxDNuT2RMcr4Ue02jrtTqyYOCNgS2DhtMT35M) but will I get additional performance boost out of that?