Next-day update: Original post title: Rockchip 3288 Can’t Handle 64GB And Larger SD Cards. The IMP3Net post was updated. It turns out this limitation applies to the Teclast P90HD. There’s no such limitation with the Pipo P1. Also see Comments for this post that provide additional information about the card formatting issue.
Someone at the IMP3Net forum has been monitoring a Taiwan forum where it’s been discovered the Rockchip 3288 can’t handle large SD cards [Google Translate]:
I have been paying close attention to the new program supports RK SDXC memory card format. Noting that night, Taiwan’s largest 3C forum has been home to start 3288 with a home feedback first, does not support 64GB TF card, the second is the video hardware solutions have color, looks like this is the era of 3188, there’s a problem.
This time last year the forum has discussed RK3188 seniors does not support 64GB cards and exFAT formatted posts. It seems Rockchip company for commercial reasons, the new SOC this year in this regard is still maintained intact.
Support 64GB capacity card, it means support for SDXC format. The TF is currently 32GB SDHC (high capacity), each chip makers are supported. The 64GB and 128GB SDXC card is the new norm. Because a variety of reasons for it, now it seems there is no support for RK.
Boldfaced emphasis added by me.
Anyone who thought they could pop a high-capacity microSD card into a Rockchip 3288-based tablet Teclast P90HD had better reconsider. Rockchip hasn’t changed card access limits in the transition from the 3188 to the 3288.
I must admit I never wondered about this.