Suit Case vs Folder Icons?

[MCIBUS]

This may sound like a stupid question but whats the different between the suite case icon and the folder icon on your desk top or laptop computer on the monitor screen?

I'm not to good with computers, but I put a suite case icon and a folder icon and when I drag some my short cuts icons the ones I put into the folder went in and disappeared from the screen, but the ones I draged to the suite case although they went into the suite case the icon still appeared on the screen?

So

1) is this suppose to happen?

2) Does the suite case do more with other programs then a folder does?

I know this thread may sound stupid but was just wondering?