What is the maximum hard disk capacity does CloudFTP / iUSBPort support? Shirley June 24, 2013 22:29 Follow Currently the CloudFTP / iUSBPort support up to 2TB hard disk only. Related articles Slow copy from SD/flash to HDD - Fix! How to write file to the USB hard disk through the iUSBport / CloudFTP device? Can I upload file/files from iDevice/CPU to CloudFTP USB Drive? Comments 0 comments Please sign in to leave a comment.