SanDisk Ultra 64GB MicroSD Memory Card (MicroSDXC) for $16.
We bought one during its last sale at $19, and it works very well.
Most SD cards should be very reliable, but we feel comfortable knowing the SanDisk Ultra brand has been reliable for a long time.
SanDisk makes excellent quality memory products backed by a great warranty.
We have never had a SanDisk drive fail, however keep in mind, portable flash drives are only designed to last around 10 years before they start to degrade.
- Sandisk 32GB SD Card for $13
Sandisk Ultra Plus 32GB Secure Digital (SDHC) Memory Card for $13.
Also includes $20 credit at Shutterfly, although you probably pay the shipping fee to deliver your printed photos.
This card normally sells for about $16.