Have you heard about the new MicroSD card functionality coming in Android M? It's pretty awesome, and it gives you a new reason to invest in external storage (and pester your manufacturer of choice to include a card slot in its next flagship). Android M won't be available in non-developer form for a few months, but if you want to get a head start on cheap storage, Amazon's Gold Box deal portal is the place to be today. The retailer is offering some impressive deals on PNY brand MicroSD cards, from 16GB all the way up to a massive 128GB.

Here's the full list of discounted MicroSD cards today.

All of these cards are rated as Class 10 or better, so they should be able to handle storing apps or quickly writing photos or video. Speaking of which, if you're in the market for camera cards or standard USB storage drives, Amazon also has those on sale today. As usual, all Gold Box deals are good for one day only, and Amazon Prime members get free two-day shipping.