Thanks for the report. If using a SSD, do not standby the L1 unnecessarily. SSD do not like standby.
In addition to cloning, there is a procedure to format the drive inside LUMIN L1 (in case the drive needs to be replaced). This procedure erases all data (music) in the drive, obviously:
1. If the drive is not brand new, connect L1 to a computer via USB to delete ALL the partitions in the drive first (using Disk Management if on Windows platform)
2. Connect L1 LAN
3. Disconnect L1 USB
4. Boot up L1 and wait until the RED LED flashes
5. Hold the power button for 6 seconds
Note: even if the power button is held, the format will not be triggered if the RED LED is not flashing, so there is no risk of accidentally formatting it unintentionally during normal operation.