Can't figure out how to add all my Mp3 files to VLC

[JCatguy]

Hi All,
I was able to find, both Media and Playlist...but when I click on Media for example...and unfortunately, my MP3's are scattered amongst 2 older hard drives, that were poorly added to my new computer. So, I tried I found the folder that kept about 8 gigs of mp3's. However, there are a few yellow folders in it as well.
It appears that the only way, I could add...each song, would be "ONE BY ONE"...?

I tried finding the backup/my music...and underneath typing, *,mp3 or *.*. but I can't get them. Only as I wrote, in piece meal.

I'm hoping there's something I'm missing...as I want to transfer everything form RealPlayer over to VLC Player...
In Real Player it locates all the files, but so does, "Files and folders". In FIles and Folders I clicked, ".mp3 and thousands of songs came up. But I haven't a clue how to add them...as I even copied and pasted the address of the majorityh of those mp3's...but, because some have yellow folders in them (I Dont' know the reason)...i'm not getting EVERYTHING...not even close.
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Second Question, I tried by adding a complete folder (music), but within that folder, there were 100's items that are wave sounds from SIMS and other garbage, how can I delete those, without keeping the good? Can I start over...I really don't want to delete VLC and restore it... Thanks a lot......JCatGuy
VLC plays MKV movies, that's great!

PS

[VLC_help]

For first question, create playlist in Real Player and open it in VLC.

For second, you can manually delete items from VLC playlist.