iTunes
Make sure your music is tagged properly
Connect phone in USB storage mode, open it in Finder, make a Music folder if you don't already have one
Drag whole albums from the iTunes window onto your music folder (sd card)
- provided they're tagged properly, albums will appear as albums (no duplication). Done!
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You can keep high grade music on your mbp & have lossy set in your phone. In iTunes import prefs, change it to the format you want (I have AAC on my phone). Select all the music you want to convert & get the menu on it, choose "create AAC version" (or whatever you set it to).
Then make a smart playlist, where "kind" is AAC Audio File (it must be written how it is shown in "kind") & you will then have a playlist with ONLY AAC music, & you can drag music from this playlist to your sd card music folder.
It's best to do the same for your high grade music too (I have AIFF & AAC playlists), because your iTunes music now has two copies (AIFF & AAC).