NO HARD DISK FOUND

this confirms that system does not see any disks except the ISO which is mounted as /cdrom

You can try a few things:
- Try standard Debian and/or Ubuntu ISO available from their website. Check if the disks appear
- Reset your BIOS
- Make sure you upgraded everything related to BIOS and Firmware


Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox
Ok well I tried the standard debian so I guess next up would be resetting bios, how do I do that?
 
I think nobody can tell this without knowing your bios. Every bios is different.... Normally you should see a setting to go to standard setting.
Ok I reset it and got switched the setting around back to UEFI and the boot order to the USB and it still shows no hard disk found
 
Try booting the host from a more comprehensive Linux live CD, such as SystemRescueCD, where there will be more drivers available. Then, execute the 'lsblk' command there.
If you can see those drives in the BIOS, it might be that your Linux distribution used for booting doesn't recognize them
Not sure what all that means. so far I tried resetting the BIOS and also updated it to the newest version and it still shows nothing, also tried Debian and it didn't recognize the drives either
 
Since you already excluded PVE as the cause of your disks not showing up during basic Linux installation, we can conclude that your issue is not related to "Proxmox VE: Installation and configuration".

There could be other better equipped communities that can assist you, ie:
https://www.dell.com/community/en/topics/linux-developer-systems
https://www.dell.com/community/en/topics/poweredge-os-forum



Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox
 
Not sure if this will help anyone but I purchased a R730 from ebay and it came with HDD's. I had to go into the controller settings in the bios, the physical storage section and convert one of the HDD's to NON-RAID. Proxmox was then able to recognise the drive. I am just installing now so if anything goes funny i will update. I am not great at this stuff just learning but i hope this helps someone else out there that is in my situation