How long should I burn in an aune product?
100 hours is recommended.
How should I deal with a DST file that cannot be played?
Use a software to convert it to DSD.
Can I use a quick charger to charge the portable products?
Yes, but the charging won't be faster.
How should I deal with a highly-compressed APE file that cannot be played?
Use a software to uncompress it to WAV.