Select ExFAT in the Format drop-down list and begin to format. Then click the Erase button at the top of the right panel.Open macOS Finder -> Applications -> Utilities -> Disk Utility.So we should change the USB Disk file format to others such as FAT or ExFAT.
So if the USB disk is NTFS format, then the copy and paste operation can not be operated. The main reason for this issue is macOS can only read NTFS format files but can not write files to NTFS disk. Format The USB Disk With ExFat File Format.
