Purchase Inboard from Mac App Store and then use Inboard’s Migration Assistant
Inboard supports PNG, JPG, GIF, PSD, AI, EPS, TIFF and PDF.
iCloud integration is still one of the top priorities for Inboard at the moment, but we could not include that into our first Mac App Store version because that would delay this release even further. Our beta period was already almost 2 years long and it was time to finally release the Mac App Store version. Being on the App Store and finally charging for this app should change the momentum of new releases.
We’re focusing on Mac App at the moment, but possible future iPad or iPhone app are not out of the question.
They are stored locally on your Mac. You can reveal the location of them by right clicking any item and choosing “Show in Finder”. We are planning to add cloud storage option to Inboard in the future.
We could not have explained it better than The Oatmeal did here.