unable to mount sdcard

[Pinnamaneni Dheeraz]

My mobile is HTC One s(s3) . I used the twrp flash recovery for the phone. Everything worked fine. I went into the teamwin thing and i tried mounting the mobile to use as a usb device. which won't work. The message being displayed is unable to mount /sdcard. Point is htc one s does not have an sdcard. and yeah when i try rebooting it there is the usual htc red text being displayed and it is stuck like that. The red text being displayed-"This build is for development........."

Thanks in advance!