At $120, the 128GB iXpand works out to an affordable $0.94 per gigabyte. Three additional models are available, but the value isn't quite as great. The $89.99 64GB model costs $1.41 per GB, the $59.99 32GB model comes to $1.87, and the $49.99 16GB drive is the most expensive, at $3.12 per GB.

Fast read speeds; Built-in file manager; Integrated media playback and auto-backup

Flimsy connector cable; App crashed repeatedly when transferring large files in testing

The SanDisk iXpand Flash Drive is a must-have accessory for those with a newer iPhone or iPad.

The SanDisk iXpand Flash Drive instantly adds up to 128GB of storage space and it can work as a USB thumbdrive; Its iXpand Sync mobile app works very well both for media playback and content backup

The drive can't hold files larger than 4GB and only supports USB 2.0

Android users have always enjoyed expanding storage capabilities of their devices using either memory cards or USB drives. Apple, on the other hand, has never added an expansion slot on the iPhone.

+ Easy transfer to iOS devices; + Long Battery Life; + Nice App

- Large in Size

SanDisk has released a new version of its iXpand Flash Drive for Apple tablets and phones. This has a slimmer design, new software, and faster transfer speeds.

Apple 's iPhone users have traditionally struggled with the storage space they get in their devices. There are two reasons for this: one, extra storage on a iOS device comes at a premium; two, iOS does not offer options like expandable storage, which is popular in Android devices.

For a ton of iPhone users out there I can see the iXpand Flash Drive coming in handy when they are running out of space from the tons of pictures they like to take. They can copy them over and save to a PC/MAC for storage and then clear out their iPhones.

SanDisk's iXpand in its second iteration is a solid, high performance solution for iOS users. On the downside, it carries a price point well over $1 per GB, making it one of the more expensive solutions.

This a great extra for your iPhone or iPad. I used it to backup photos on both. Since I bought mine, I have ordered two to give as gifts.

Bought to provide mobile & instant storage capacity for iphone. Works great, the interface is also simple and reliable. I wish I was aware of this a few years ago. These ought to be sold at phone stores right there next to the iphone case.

My wife and I recently returned from our honeymoon in the American Southwest. We toured the Grand Canyon, Bryce Canyon, Lake Powell and the Hoover Dam over the course of nine wonderful days.

Lightweight; sleek design; Viewing video on iPhone; Sharing files via Airdrop; Securing sensitive files

Speed; Price; Could be obsolete with next-generation iPhones