How do I move gigabytes of data from my computer to my phone's SD card?
I put the SD card in the computer and drag &amp; drop there. I have a SD slot and use a uSD to SD card adapter. Try dragging smaller chunks vs all at once.  I have a 64GB card and drag 20-30 folders at a time, each folder being a complete album. Getting ready to install a 128GB card and do it all again to hold about half my music collection.