To clone a virtual system with a 20GB HDD from a computer using USB2, I use huge flash drives. The process takes 4 minutes to complete when using Silicon Power to copy archives to a USB flash drive while simultaneously archiving with a Rar profile (high-speed archiving, split into 150 MB volumes), and 6 minutes while using Transcend. Both flash drives have the same feature, but are 2 times faster on a device with USB 3.
Kingston DataTraveler flash drive 100 G3 256 GB, 1 pc. black
74 Review
32GB SanDisk USB Flash Drive (SDCZ430-032G-A46)
78 Review
Titan Gray Samsung BAR Plus 256GB USB 3.1 Flash Drive (MUF-256BE4/AM) with Up to 400MB/s Transfer Speed
69 Review
Compact and Convenient: SanDisk Cruzer Fit USB 32GB Flash Drive (SDCZ33-032G-A11)
66 Review
2 TB External HDD Western Digital WD Elements Portable (WDBU), USB 3.0, black
84 Review
Shock-Resistant Transcend StoreJet 25M3 USB 3.1 Slim Portable Hard Drive with 500GB Capacity
99 Review
18 TB External HDD Western Digital WD Elements Desktop, USB 3.0, black
95 Review
๐ Seagate Backup Plus Slim STHN2000400 2TB Portable Hard Drive - Black: Your Reliable External Storage Solution
93 Review