Just got a 128Gb micro usb card.
Works on my Galaxy S2 phone and Tab 2 10.1 tablet; both running Jelly Bean.
My use, on my phone, is as a juke box. I have a laptop, with 80GB audio files, connected to my hifi via a DAC:-
actually I have an older model.
Now I have bluetooth receiver:-
Wireless Bluetooth BT Receivers
connected to the DAC and all 80GB audio files, from my laptop, now on the 128GB card. Using Poweramp app I can send 320bps MP3 or Flac files to the DAC from the armchair. Laptop only switched now on for ripping purposes. Phone can also pick BBC Radio Player.
Prior to the 128Gb card I had to convert the laptop files to a lower quality to fit on the smaller card and even then could not fit all. Lower quality did not matter as phone files only played over ear buds.
My tablet has a 64Gb card on which I store ripped film DVDs (about 1Gb per film) which I can send to my TV via a Chromecast HDMI dongle. Tablet can also pickup BBC iPlayer.
Of course people with youger eyes and ears than mine may find the sound/vision quality too low.
I would expect that these cards will work on many Andriod phones/tablets
My CD and DVDs, which I still buy, are only played once when first ripped; I sometimes get out the CD/DVD if I want to read the liner notes or play the extra features of a DVD, as I don't rip these.