As one of its daily deals, Amazon cuts up to 75% off select SanDisk memory cards, with prices starting at $19.99. Plus, Amazon Prime members qualify for free shipping on all items. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping starts at $8.02.) That's among the best sales we've seen on these items from Amazon in recent months. Deal ends today.

A best bet is the SanDisk 64GB Ultra UHS-I Class 10 microSDXC Memory Card with Adapter (pictured), model no. SDSDQUA-064G-U46A, for $43.49 with free shipping ($0.68.GB). That's $11 under our September mention and the best price we've ever seen for this microSDXC card. (It's also a current price low by $17.) It's UHS-I enabled and comes with a full-size SD card adapter.

Amazon Prime membership is $79 per year; however, Prime is free for college students for one year, and free for parents and caregivers for three months.