SD cards 
Thank yourself that floppy disks are not the main way to add storage to your device.
SD cards can increase your device by up to 512GB but you are most likely going to buy a 32/64/128Gb models. Make sure you check the read and write speeds of your card. They can range from 10mb/s to 100mb/s. Anything over 30mb/s should be fine depending on what you use it for, prices can vary considerably.
Power banks 
Running out of battery? Want to keep your screen on max brightness all day? Well why not buy a power bank. Try having a wall socket in your pocket (copyright pending). You can get a lighter sized PB to charge your phone or go for a bigger model (that still fits in your pocket) that can charge your phone many times or keep your tablet going for an extra 20 Hours.
Tablet Cases 
There are many reasons to get a case. You shield it from damage, an extra place to store things like pens and business cards. Your case can open into a stand to make use more practical. The case hides what device you have from thieves. You protect your device from water. You can personalise your device because there are many different cases on the market, both generic universal and device specific. Definitely worth a few quid.
Surge protector 
If you are using any computer equipment and there is a surge in power, your device can get damaged. We recommend a good quality extension cable that has not only surge protector, but also a built in battery so your desktop will not shut down, thus losing all the data you failed to back-up.
Screen protector 
There are times when you will drop your device and the first thing that enters your head is, “Please don’t let the screen be cracked”. We have all seen people pull out a phone or a tablet and the screen is cracked but they still use their device. We all hope it doesn’t happen to us. Screen protectors are great for tablets and can be bought for not very much and might just save you from some heart break one day.