Thanks Helen I have OS7 on iphone 4s and Ipad air - neither are showing contents . The UI and the hard drive both show that there is info. The UI says it's indexing etc. I synced a directory in the drive (maybe 150gb). I gave it a day or so just in case it took time to update but no joy. I have BT sync installed on another system at home and it workd perfectly. It just seems the work one is causing trouble. I changed broadband providers and modem just in case it was that. The data is on a d link NAS. I first tried installing BTSync on the NAS but it simply wouldnt work - no idea why. Then I decided just to map the NAS as a drive, install BT sync on an office laptop and go from there instead My thinking is that the permissions for the connection between the laptop and the NAS are not sufficient to share out. I will send the log. Many thanks for the assistance.