Access from the Internet TO the NAS via Shared Folder

Greetings.

I have purchased a Qnap NAS to have full access from the world to my NAS in the office with a username and password without applications, through WEBDAV, but they tell me that my device is not compatible with the protocol.
I ask for your help, what option or application can I use for this requirement.
access from the world through http or https with username and password to my public folder

Thanks for your help

I google QNAP and WEBDAV and found the following link, see if it helps: Accessing your QNAP NAS remotely with WebDAV | QNAP (US)

Greetings,
When you state access from the world (internet) without applications, what does that mean exactly?
We need more information to better understand what you are trying to do.

Generally speaking. If you have your NAS exposed directly to the web and are not using myQNAPCloud, VPN or similar you are asking for trouble. Its not a matter of if, its when.

I recommend you take immediate measures to secure remote access to your device.

Yes direct exposure via port forward is data suicide, use a VPN (no, hat does not cost any monthly fees) to remote access your LAN , the VPN server is best installed on your router or a dedicated appliance

You can also use myqnapcloud. The only difference is you need to open a browser to work on the NAS.

Them VPN is not needed.

Important to note that this HAS to be CloudLINK not DDNS with open ports (data suicide)