
Drive needs an app to "back up" your phone, iCloud already does that. So it's superfluous. It allows you to copy or move your photos/documents to disk and it works well. Although classified as USB 3.0, the speed is similar to a good USB 2.0. You're lucky to see 15-18 MB/s. Other USB 3.0 drives that reach 500 MB/s are rather disappointing. Being more of a 'backup', the images are saved in Apple's proprietary Live Photo format, preventing them from being viewed on a PC. Disappointed again because I can watch them on Mac without using this disc. I do this to move pictures to PC and free up space on iPhone.

Compact and Convenient: SanDisk Cruzer Fit USB 32GB Flash Drive (SDCZ33-032G-A11)
66 Review

Sandisk Ultra Flair 128 GB Silver USB Flash Drive: Reliable and High-Speed Storage
65 Review

Titan Gray Samsung BAR Plus 256GB USB 3.1 Flash Drive (MUF-256BE4/AM) with Up to 400MB/s Transfer Speed
69 Review

Samsung BAR Plus 128GB USB 3.1 Flash Drive - 400MB/s - Champagne Silver (MUF-128BE3/AM)
65 Review

2 TB External HDD Western Digital WD Elements Portable (WDBU), USB 3.0, black
84 Review

π Seagate Expansion 3TB Portable USB 3.0 External Hard Drive (STEA3000400) in Black
60 Review

8TB Seagate Backup Plus Hub Desktop Hard Drive with Data Recovery Services
56 Review

18 TB External HDD Western Digital WD Elements Desktop, USB 3.0, black
95 Review