One of our specialties is programming complex eBooks and that can often mean that the final file can be quite large (here’s why*). If you are uploading the files into the stores then as long as the file size meets the requirements of the store, a large file won’t be a problem. But what happens if you want to have someone help you proof the eBook? Or you wish to share it with a colleague?
The procedure is called sideloading and there are two steps. Sending the file(s) and loading them on the app or device.
For sending large files we recommend wetransfer.com or hightail.com. Sideloading them on a device depends on the device and this article addresses one of the most common and complex transfers: sideloading a large Kindle Mobi file on an iOS device—an iPad or iPhone. (Read this tutorial if you have a file that is small enough to be emailed.)
Before beginning make sure you have iTunes installed on your computer. Also make sure you have the Kindle for iPad or iPhone installed on the device that you want to sideload to.
1. Boot-up iTunes. Once loaded, connect your iOS device via the special Apple cable.
2. Wait for iTunes and your device to finish syncing.
3. On the right, click the iPad (or iPhone) button.
4. It changes to read (on the right) On This iPad. Now click the Apps menu item to the left of On This iPad.
5. Here you see all the Apps you have installed including one or more under the File Sharing heading. Note what it says:
The apps listed below can transfer documents between your iPad and this computer.
6. Click your Kindle app icon (it is installed, right?). Note that I also have the Nook for PC and the Apple iBooks app in the above screen shot. In this case you also see several Mobi eBook files that I have transferred using this method.
7. Now click and drag your Mobi file from your computer to the Kindle Documents window and drop it. The file is added to the list. (You can click and delete files here as well.)
8. Eject your device from iTunes, open the Kindle App. You can find it under Docs, as opposed to Books. Be sure you are looking at the files on your Device and not Cloud.
* Why files are large, especially Mobi files
The more graphics in your file, the larger the file size. That makes sense. But when Previewer creates the Mobi file it actually creates a few versions of the eBook, three was the last number I heard. The KDP ingestion system receives your file and then parses it into versions for the various Kindle devices and reading apps. So the actual file loaded on your customer's device is smaller than this file size.