files.appicloudipadphotos.app
It might sound strange but trying to save the photo portfolios to my iPad using photostream to transfer from iMac, noticed that in one of the folders not all the photos were saved.
Repeated several times, the weird thing is that is always the same number of photos missing from photo stream to the destination folder. I really don't know how to address this problem.
All photos on Photo Stream are stored in the cloud in full resolution. When they are pushed to an iPhone, iPad, iPod touch or Apple TV, they are downsized to make the best use of bandwidth available to those devices. So when you save a photo which was taken by another device from Photo Stream to your iPad's Camera Roll, it doesn't receive the full resolution photo.
However, if you take a photo with an iPad (or iPhone/iPod Touch), you will have a full resolution version of the photo in Camera Roll. You will also have a full resolution photo pushed to Photo Stream and on any Mac or PC which is synced with that Photo Stream account and a downsized version on any other iOS devices synced with that account also.
From Apple Support:
On your Mac or PC, your photos are downloaded and stored in full resolution. On your iPhone, iPad, iPod touch, and Apple TV, your Photo Stream photos are delivered in a device-optimized resolution that speeds downloads and saves storage space. While actual dimensions will vary, an optimized version of a photo taken by a standard point-and-shoot camera will have a 2048 x 1536 pixel resolution when pushed to your devices.
You could use a 3rd-party app such as the free WiFi Photo Transfer to access all those pictures on your MacBook Air. It uses a web browser to access the photos, so you don't have to install any software on the MacBook Air or deal with syncing.
The whole process is easy:
Another benefit is that none of the pictures are sent to the Internet.
Best Answer
I don't understand your question completely, but I'm pretty sure:
You have reached the sharing limit on Photo Stream or iCloud. Apparently you can only transfer so many photos per hour, or per day. (Read more in the Apple support article.)
It might also be that there is a limit on your iPad for memory space. Is your iPad memory full?