Question about my sd micro card with backup copy

[Robert Burns4]

I wanted to delete this question to put it in the correct part of the forum..I apologize for posting it here..

 

[Golfdriver97]

I had switched my sd micro card in my phone to retrieve pictures from my moms phone. She also had a cricket phone which had a larger mb, sd card that she wasn't using due to her getting a new phone, sd card so I put her sd card she wasn't using from the cricket phone and I put it in my phone and took my original sd card from my phone and put away for now. I went to try to install a app and it said it needed rooted so I goggled for a root app and downloaded it and after it loaded I wasn't really sure what to do with it. But then it let me use that app I wanted to install before rooting so it may of done something to let that app work. After looking thru the internet forums someone said to ES file explore and it shows a bunch of folders that is on the /mnt/sccard-ext and on the /mnt/sdcard .
What I would like to do is to put my original sd card that came with my LG Optimus Dynamic LG-L38C. When I put that sd carn into my card reader it shows this list of folders .android _secure, audio, brew, diag, download, image, LOST.DIR, other, video
How do I go about switching out to put the original sd card back in? Is there anyting I need to do before hand? Would I need to turn off the phone and switch out the cards if the phone was rooted? And after putting the original sd card back in, would it be a good idea to do a factory data reset?

First, welcome to the forums!
As for your concern...you can unmount the card from Settings>Storage>Unmount SD card. You can also turn the device off, switch out the cards and restart.
The thing I am having a hard time understanding is what was the root app you needed?

Also, just so you know: Your question was posted in the wrong section. For something like this, try posting in either the device specific forum, or in this case, you could post in General Help and How to. Just trying to help for future questions.