259844_1454182107

What is the software they are using to sync files and keep deletions?

What software is being used to put the network drive files into a deleted folder? That would be nice to have!

Would love to know the model numbers of your Supermicro 2u server and the 2u black server with the 8 x8gb drives. Also, which backup software are you using to auto-backup? That will come in handy for a lot of people here.

What software is used to replicate the data between the two severs?

I did but it didn't list anything

Heres my take on the Ryzen build, tried to go for an orange and black color scheme, and air cooling over water cooling. 
PCPartPicker part list / Price breakdown by merchant
CPU: AMD RYZEN 7 1700 3.0GHz 8-Core Processor  (€343.94 @ Mindfactory) 
CPU Cooler: Noctua NH-D14 65.0 CFM CPU Cooler  (€71.41 @ Amazon Deutschland) 
Motherboard: MSI B350 TOMAHAWK ATX AM4 Motherboard  (€120.85 @ Amazon Deutschland) 
Memory: Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-3000 Memory  (€137.84 @ Mindfactory) 
Storage: Samsung 850 EVO-Series 500GB 2.5" Solid State Drive  (€171.60 @ Mindfactory) 
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive  (€80.72 @ Mindfactory) 
Video Card: EVGA GeForce GTX 1080 Ti 11GB SC2 Video Card  (€851.56 @ Mindfactory) 
Case: NZXT (Matte Black/Orange) ATX Mid Tower Case  (€132.83 @ Mindfactory) 
Power Supply: EVGA SuperNOVA G2 650W 80+ Gold Certified Fully-Modular ATX Power Supply 
Case Fan: Thermaltake Riing 12 LED Orange 40.6 CFM  120mm Fan  (€16.69 @ Amazon Deutschland) 
Case Fan: Thermaltake Riing 12 LED Orange 40.6 CFM  120mm Fan  (€16.69 @ Amazon Deutschland) 
Case Fan: Thermaltake Riing 12 LED Orange 40.6 CFM  120mm Fan  (€16.69 @ Amazon Deutschland) 
Total: €1960.82
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-04-24 16:13 CEST+0200

PCPartPicker part list: https://de.pcpartpicker.com/list/cfmNFd
Price breakdown by merchant: https://de.pcpartpicker.com/list/cfmNFd/by_merchant/
CPU: AMD RYZEN 7 1700 3.0GHz 8-Core Processor  (€343.94 @ Mindfactory) 
CPU Cooler: Corsair H100i v2 70.7 CFM Liquid CPU Cooler  (€122.89 @ Amazon Deutschland) 
Motherboard: Asus PRIME X370-PRO ATX AM4 Motherboard  (€165.94 @ Amazon Deutschland) 
Memory: Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-3000 Memory  (€137.84 @ Mindfactory) 
Storage: Samsung 850 EVO-Series 500GB 2.5" Solid State Drive  (€171.70 @ Mindfactory) 
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive  (€80.72 @ Mindfactory) 
Video Card: EVGA GeForce GTX 1080 Ti 11GB SC2 Video Card  (€851.56 @ Mindfactory) 
Case: NZXT S340 Elite (White) ATX Mid Tower Case  (€107.83 @ Mindfactory) 
Power Supply: EVGA SuperNOVA G2 650W 80+ Gold Certified Fully-Modular ATX Power Supply 
Total: €1982.42
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-04-24 16:08 CEST+0200

These guys have got you covered.

oh god I LOVE that site, thanks for showing it to me.

The difference would effectively be 1080p vs 4K vs 4K (rendered down to 1080p). 
1080p from 4K looks much better than native 1080p but whether its worth the difference is for you to decide. Bear in mind this is comparing max settings at both resolutions so a 1050 couldn't push that at upscaled 4K or natively.
 
Screenshots were taken with FRAPs in game in JC3
4K screenshot re-rendered at 1080p

Native 4K screenshot

1080p screenshot

Personally I have the 558s and I really love them. They're even cheaper.

Nvme offers 0 benefits for gaming. 

just asking? thought about a NAS ? there are crazy fast ones don't you worry. it comes down to what you are willing to spend in total. there are adaptec raid controllers (at least those are the one I know of) that can provide the function you are looking for, but they start at 500$+.
so a NAS maybe not that far fetched. sth. on the upper end like the RS series from Synology maybe even coupled with the RP addon units, they also can be set up with ssd cache... it gets expensive on that end quit fast though.