Storage on NoName 187B

Recently bought a NoName 187B from ddren's website and I would like to know what are my options in terms of storage capacity supported.

Since most of my files are in FLAC or high bitrate MP3, I need to pick a storage device with relatively high capacity. I've read somewhere that the maximum for the SD-Card is 32gb, is this correct? Does the usb port also support storage devices like pen drives or external hard drives? If so, is there any limit to the capacity?

Mobile data prices are very prohibitive around here so I need to go offline for the most part and since I would rather use my phone's storage for something else other than a few music files, a more specific device for the purpose is the best option here. What are your setups for music listening?