CDJ 3000 USB port loading issues 

USB port error: https://drive.google.com/open?id=1CsOS6pEihn3z1XJVQLCQVFqBbpbhVxjh&usp=drive_fs

Hi, I which to check if the following issues have occurred with any of you on CDJ3000.
We use the CDJs daily at our venue and already have the units for around 14 months. 
Almost every day, we encounter that flash drives or SSD drives are taking an immensely long time to load or not load at all. This occurs on both devices. 
We have to unplug the USB, then restart the device, and then it will recognize the drive. Sometimes we have to repeat this process 2 or 3 times before it will recognize.
This has happened on both CDJS for a while now.
 
In the last couple of weeks, we also encounter that during the set, the CDJ '(r)ejects' the drive for no apparent reason. The tracks will go in an emergency loop. 
The last time this happened was yesterday, while already playing for about 2hrs.
The USB port keeps blinking white, though doesn't recognize the drive anymore.
Both CDJs have the latest FW.
Can this be a software or hardware issue?

Any input would be much appreciated.