Originally Posted by donbrubaker
1) I'm told that you can't use both Calibre and Sony's management software with the same device... you have to use 1 or the other.
2) If your ebooks are all "DRMed" epub (you mentioned Adobe Digital Editions) then you can use Calibre to get the content to your readers, but the readers may not be able to open the content. In that case you may want to consider removing the "DRM" which is legal and illegal in various locations.
1 - at least on the 505, you can use both, just probably best to only have one running at time. Copy something with the Sony software, close it, then start calibre (or vice versa)
2 - You can open DRM ebooks copied with calibre on your reader if the reader has been authorized. You just cannot open DRMed content in Calibre itself.