Default Music players crash entire phone with large sd card library?

Stock unrooted tmobile -- 64gb Sandisk Ultra

I loaded around 50gb of music on my sd card but now my main music apps crash and more than once an hour cause the phone to reboot. Tried incrementally loading after a SD card reformat and everything went haywire around 30gb. This should be able to handle the whole library, right?

Stock
PlayerPro
WinAmp
Galaxy Note 3-stock unrooted -- HTC One M7-TrickDroid(retired) -- HP Touchpad-Ubuntu/WebOS (bathroom) -- Galaxy 7.7-Stock4work -- Playbook-does tricks...(kitchen) -- Iphones 4s/5(retired)
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