Amazon has you covered today, with a 60% off sale on many of Sony’s flash storage products.
A 16GB micro SD card can be had for $7.99. If you need more, a 32GB card runs just $11.99; 64GB for $25.99.
And if micro SD is not what you need, maybe a full sized memory card for your camera or a USB drive will do the trick. Yep, those are on sale too.