Amazon offers Prime members the Transcend 64GB microSDXC Class 10 UHS-1 Memory Card with Adapter, model no. TS64GUSDU1E, for $24.99 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, it adds $8.00.) That's $5 under our May mention and the lowest total price we could find by $8. It features transfer rates of up to 45MB/s; is compatible with microSD, microSDHC, and microSDXC slots; and includes an SD adapter.