How to download multiple files without zipping on andrioid phone

[TMJ]

Mine is F2-210.

If I go to "files" at TNAS Mobile (V2.4.20) can only download files one by one;
Over the internet, I go to https://TNAS.online/xxxxx, looks like this is where can only manage file;
On local network, I go to shared folder, multiple files under a folder must be zipped before download;

Come on, dude, is there a way on a andrioid device I can, like using a windows file explorer, select and download/copy multiple files without zipping?

[TMzethar]

You can use FTP/SFTP/webDAV service, after mapping port and setting domain name for your IP, you can remotely connect and manage files through file tools that support FTP/SFTP/webDAV.
Here are the setup instructions for remote access to the HTTPs port, which can be used as a reference.
viewtopic.php?f=78&t=433