Hoew can I combine the files divided and created by WinRAR in the original file (compressed zip package, I think)?

I have several file folders created by WinRAR, I believe. These are files that exist in groups of 3, with the extensions .0, .1 and .IDX.

I have old data that, in my opinion, are old pictures or old movies. I'm sure I separated them with WinRAR playing with it. I recently discovered the old files and I hoped to be able to check them. They could keep good memories if I could recompile them.

Thank you for any help.