How about this :
Load a previously created list from a USB drive or via SMB / NFS
>Open file format *.m3u from a USB drive or from the available network resources (USB-storages «mount» automatically in «Media Browser» or «Home Media», Local Area Net resources are available in SMB-browser-«SAMBA» in «Media Browser» or«Home Media»);
>When you open the answer to the question about the encoding of the file;
>Save the list of channels;
>If you refuse to save the channel list, you can select the channels (F3 button on remote or“menu” - “Select All”) and add them to the“IPTV Channels” - “menu” - “Copy” - “TV”button on remote - “menu” - “Paste”
File Format: m3u, UTF-8 encoding (recommended)
The 254 does have a "Browser" doesn't it...?!?