This is not a good idea. Repeat after me-- This is not a good idea.
That said, it is possible to mount NFS mounts in windows as drive letters.
It is also possible to get the MyCloud’s NFS daemon to use static ports so that they can be routed over a firewall.
Now, once more, with feeling. THIS IS NOT A GOOD IDEA. WE DONT ALLOW THE INTERNET AT LARGE TO ACCESS OUR FILE SHARES, BECAUSE THAT IS DUMB, AND IS HOW YOU GET RANSOM-WARED, OR WORSE.
What should you do instead? Use a VPN, then connect to the mycloud at your remote location over the VPN tunnel. Use a good VPN that does full transport encryption, with 2 factor auth. Once you do that, you can use SMB over the VPN, and you can mount the shares as if they were local.
I only mention the use of routed NFS mounts for academic completeness, or if you have a multi-homed corporate network that you need to get many subnets worth of users access, who are behind various internal firewalls, and SMB is restricted for “reasons.” (EG, you MIGHT have a legitimate reason to not want or need to set up VPN as the solution. If you want to access the MyCloud remotely as a drive, set up a VPN.)
