The following is information to help troubleshoot in the event that a computer does not recognize the R-05:
USB
- IMPORTANT: Do not use a USB cable that is designed only for charging a device. Charge-only cables cannot transmit data. Check the documentation of the cable being used to be sure that the cable is not designed for charge-only.
- Try a different USB cable (if available)
- Try a different USB port on the computer.
Note: Do not connect the recorder to a USB hub while troubleshooting. - Note to Apple users: If using a USB-C adapter, be sure to use an Apple brand USB-C to USB adapter--or at least a name brand. 3rd party adapters can be less reliable than Apple brand.
POWER
- Test with new, unused Alkaline or Nickel Hydrogen batteries.
Note: Lithium batteries are not compatible with the recorder. - If using a power supply, be sure that a PSB-6U or UDC-25 power supply is being used only--3rd party power supplies can cause the unit to not operate properly.
SD CARD
- Test with the SD that was included with the R-05 and not a 3rd party SD--just while troubleshooting.
- Be sure that the SD card being used is compatible:
https://www.roland.com/us/support/knowledge_base/201977559/ - Be sure that the SD card is inserted correctly. Try removing the SD card and the reinserting the card.
- You may have a fragmented memory card--due to improper ejection from a computer, power loss while recording, not formatting a new SD card, etc. We would recommend formatting the SD card to alleviate the possible fragmentation on the card.
NOTE: Formatting a memory card will delete all contents on the card:
https://www.roland.com/us/support/knowledge_base/201974059/ - Try using a different SD memory card (if available) to rule out a malfunctioning card. Note that using a microSD adapter is not recommended if troubleshooting.
COMPUTER
- Be sure to log onto your computer as a user with administrative privileges.
- Close/turn off system monitoring/anti-virus software temporarily--this may be preventing your computer from recognizing the recorder.
- Be sure the computer's operating system is running at its latest version.
- Be sure that you are connecting to a USB 2.0 port on your computer; or a USB 3.0 port with backwards compatibility. Check the USB 3.0 specifications of your computer to determine if there is complete support for USB backwards compatibility.
- Test on a different computer (if available) to rule out a computer related issue.