In addition to spoon's reply:
You are using foobar2000. Open the file's properties (highlight, and alt+Enter and the Properties tab), and it will tell you the codec and the codec profile.
If it is AAC, then leave it as is unless you really have to.
Lossies are best left without transcoding, if you can avoid. You will only increase file size, you will never recover the “loss” in “lossy”, and if you ever convert to a lossy again in order to fit it to a portable player, the generation loss could make it sound just as bad as youtube videos (which have often been through that very process).
That is a redundant step. dBpoweramp can convert to FLAC. And verify.
Also, since you use foobar2000, you can use
http://www.foobar2000.org/components...foo_bitcompare to compare original and copy.