[Jimws]

I utilize Mobilesheets on my Android tablet to manage/display approximately 1600 dulcimer tabs.  I'm very satisfied w/it's ease of use, however I suspect I'm not efficiently storing my tabs.   I obtain my  musical tabs from any number of websites, free or purchased, in PDF format.  

I then: 
- scan a hard copy or download an e-copy into my tablet
- save it to my Dropbox 
- import into Mobilesheets "Songs"
- copy it to the appropriate group I've setup - typically by  song arranger

My questions are as follows:

1- After I've imported the song into Mobilesheets do I need to keep the copy I've downloaded/scanned on my tablet
2 - I assume adding a song to a Setlist would minimally impact storage 

Thanks in advance