Thank you for your help. I tried to change the permissions to root cause its on an External USB Drive with an NTFS format with no avail. But I think you are on to something. Perhaps could it be because the external drive is using the ntfs-3g driver to access the ntfs? /etc/fstab UUID=688F681855021DFG /mnt/usb ntfs-3g rw,user,exec,auto,permissions 0 0 User of BtSync Process root 2079 1.1 1.6 62988 7992 ? Ssl 19:53 0:05 /mnt/usb/btsync/btsync --config /mnt/usb/btsync/btsync.conf Permissions of Dir drwxrwxrwx 1 root root 0 Oct 27 19:57 Test_1 Error while adding with Secret $ sudo curl -Ss -u admin:pimedia "http://127.0.0.1:28888/api?method=add_folder&dir=Test_1&secret=XXXXU3C756ZRBNQPMMJPAI2KK5PXJXXXX" { "error": 100, "message": "Can't open the destination folder." } [sOLVED] Stupid Me, my add_folder path was relative and not full. $sudo curl -Ss -u admin:pimedia "http://127.0.0.1:28888/api?method=add_folder&dir=/mnt/usb/Test_1&secret=XXXXU3C756ZRBNXXXXJPAI2KK5PXJXXXX" { "error": 0 } Thanks for your help. Sometimes you need another person to look at your bugs!