Curtis LT7029 - Manual (Page 47)

Select “Paste All” and the files will move to /sd card/ automatically. If want to
delete the files, long press the file and click “delete”.
If want to delete the files, long press the file and click “delete”.
When device connect USB disk by OTG cable, the taskbar will show TF card
icon as below:
Device default “scsi_sda1” as USB disk folder. If move files from USB disk to
device or TF card, the operation is same as tfcard to sdcard.