help with r4

i just got an r4ds, and i downloaded many roms. when i put them onto my r4, it says unknown file, and says either cannot support ext.zip file or cannot support ext.rar file. can someone help?

Read the .rar tutorial in the tutorials section.https://www.romulation.org/forum/index.php/topic,1663.0.html

You need to extract it first. The files you put on the r4 you want to play must be in .nds extension.

Almo just said that...

If it's not extracted it can't work on your NDS, 8)

Almo and anadjones just said that.