Sen2Cor question

I am converting L1C files to L2A using Sen2Cor280 in SNAP.
when i set the function running it saves a folder in the original location with the name S2A_MSIL2A…SAFE , as well as opening a file in the product explorer called ‘output product’
I then have to save the ‘output product’ as a .dim file to get the correct BOA values, and this takes a very long time.
I can also open the .SAFE file in SNAP, is this a corrected product?
Any help would be appreciated to clear up this confusion!