Hello Friends!
Good news! Here is the official answer from Rick Meyers. It's easy, relies on airdrop, and it works like a charm:
Airdrop is used to share the user files between Apple devices. Both Bluetooth and Wi-Fi need to be on to use Airdrop.
On the Mac (e-Sword X), select "File, User Files, Airdrop" from the e-Sword X menu, then select the file you wish to share and click the "Airdrop" button.
On the iPad (e-Sword HD), tap the "Resources" tab along the bottom of the app. Scroll the "Installed" listing towards the bottom where the User Files are listed, and tap the "Airdrop" icon next to the file you wish to share.
On the iPhone (e-Sword LT), tap the menu button (<image001.png>), then tap the "Installed" menu item. Scroll the listing towards the bottom where the User Files are listed, and tap the "Airdrop" icon next to the file you wish to share.
Sharing the file will obviously overwrite the same on the other device, so be careful which way you are syncing!
In Christ,
~g