Adding songs without rescanning everything?

[On1]

1. If you don't use 'Advanced' at scanning, UAPP will scan only the Music folder on your device and if you have an external sd card and select it, it will scan the entire external sd card. If you want to scan in other locations, you need to select 'Advanced' and select the folder(s) you wish to scan.
2. see 1 :)
3. No, we don't want to cross that line of touching user's files at the moment

Thanks for answering, but why isn't UAPP not picking up the metadata correctly. Missing artist name, album title, etc. not for every but for some entries. I have rescanned a couple of times.