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It is a 16GB USB memory stick and at the other end the same memory shared for a Micro USB port found on SmartPhones.

It fits easily on any key ring so data can come with you. It is only 3cm long and 1.5cm wide and .7.5cm thick with a weight of less than 6 grams.

The middle has a metal clip that is 3mm wider than the casing which allows it to be added to a keyring.

Each end is the connection either USB or Micro USB with the slider that is one side of the unit centred neither is accessible push it one way and USB is extended and push the other for Micro USB to be extended.

See also: Storage

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In either of these positions you have a 16GB memory stick.

Assuming your phones Micro USB port takes OTG it becomes the easiest way to add or remove data from your phone.

Showing what data lies where on your phone should be easy but a lot of File Managers make this a less than straightforward task. Up until now I have had my favourite device but even that often wants to know more and tell less.

SanDisk have an App that does seem to work and it does not - so far anyway – seem to be Bloatware.

For those with USB ‘C’ I see from the SanDisk website they also have solutions made in the same way with USB one end and USB ‘C’ on the other.

I found the one that looks quite similar on the second link below for the same price and size as the USB to Micro USB unit I was provided with.

While the unit I was provided with was the lowest capacity available at 16GB they also do much larger units, 32GB, 64GB and even 128GB. Somewhat surprisingly the larger you purchase the cheaper it becomes which as far as storage is concerned seems slightly strange.

130MB/s file transfer from drive to computer is said to be obtainable.

While these devices work fine on USB2 ports to get anything like the theoretical speeds suggested the port to the PC would need to be USB3.

Unless you really need to transfer really large files I would worry about having 128GB or even 64GB dangling from my keyring. So the unit I was provided with at 16GB would be a cheap and quick way to get still large files from your phone to PC for £7.49 from Amazon.