@PaulVM 

if you have your router on a dmz then you need to check that the file share has access to the dmz. you also need to check the firewall on the machine you are going to reach. on windows the remote lan is blocked by default. try pinging the gateway or other devices on the remote lan to verify that the vpn is working

  @MR.S I cannot ping any PCs, printers, or other devices except my router when connected to the VPN. I think the issue lies elsewhere. In my opinion, I’m not at the PC level yet.

  @PaulVM 

have you tried trace to remote lan

  @MR.S Tracert on my router (OK) :

Trecert on the PC target (not OK):

  @PaulVM 

Your configuration looks correct, and if 10.10.10.0/24 doesn't overlap with any other networks then it should work. You can look at this link to see if there might be something there.

https://community.tp-link.com/en/business/forum/topic/653224