M3 won't update Music Library, even hangs while connecting on USB

hey guys.
I'm new to Meizu Products and got some strange issues.
I wanted to copy new music on my Meizu Music Card M3 8GB, then the startup took more than a minute and it failed updating the Music Library. The library says it got no files and it doesn't want to update itself.
When I connect it to the USB Port, my computer says:

Code:

Initializing USB Mass Storage driver...
scsi0 : SCSI emulation for USB Mass Storage devices
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
usb-storage: device found at 2
usb-storage: waiting for device to settle before scanning
usb-storage: device scan complete
usb 4-2: reset high speed USB device using ehci_hcd and address 2
usb 4-2: reset high speed USB device using ehci_hcd and address 2
usb 4-2: reset high speed USB device using ehci_hcd and address 2
usb 4-2: reset high speed USB device using ehci_hcd and address 2
usb 4-2: reset high speed USB device using ehci_hcd and address 2
scsi 0:0:0:0: scsi: Device offlined - not ready after error recovery

And my MacBook Pro says

Code:

Apr 27 18:38:56 chrisnewmbp kernel[0]: USBF:    64549.991    AppleUSBEHCI[0x4152000]::Found a transaction past the completion deadline on bus 0xfa, timing out! (Addr: 2, EP: 1)
Apr 27 18:39:07 chrisnewmbp kernel[0]: USBF:    64560.992    AppleUSBEHCI[0x4152000]::Found a transaction past the completion deadline on bus 0xfa, timing out! (Addr: 2, EP: 1)
Apr 27 18:39:18 chrisnewmbp kernel[0]: USBF:    64571.994    AppleUSBEHCI[0x4152000]::Found a transaction past the completion deadline on bus 0xfa, timing out! (Addr: 2, EP: 1)
Apr 27 18:39:29 chrisnewmbp kernel[0]: USBF:    64582.995    AppleUSBEHCI[0x4152000]::Found a transaction past the completion deadline on bus 0xfa, timing out! (Addr: 2, EP: 1)

The Meizu Music Card M3 just stucks.
Tried to reset it, but this didn't work.
DFU Tool also doesn't recognize it.
I also tried to delete some files, but this didn't work, too.
Please help me!