extract/split sheets sets

Hi all,

I have a question re multiple sheet sets. They are DWG files, saying sheet 01to02. When I open, they are only the one model, one view. No multiple sheets.

If I open in AutoCAD, the same. I thought sheet sets were .dst

Appreciate its a Microstation forum, but I am more comfortable using Microstation vs AutoCAD.

Any tips?

Cheers,

Andre