If your Android smartphone lacks a MicroSD card slot and supports USB On The Go, this flexible flash drive could solve your storage expansion problem.
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USB flash drives are increasingly popular, thanks to the ease with which they can be used to transport data between locations, their relatively low cost, and the fact that they can be used on any computer with a USB port. However, USB flash drives can cause security headaches for companies, precisely because of these factors. Documents can be inadvertently left on insecure computers, and lost or stolen drives can be readily scanned for data that companies might prefer to keep to themselves.
A charger cable that also backs up and restores your phone, MEEM is easy to use and works well. The only drawback is a relatively steep price.
The U3 platform allows mobile professionals to travel light, carrying a basic set of business applications and data on a secure USB flash drive.