External Hard Drives Changing Permissions to Read Only

I could fix it myself.

I turned of File Sharing. And performed File Utilites Volume repair on several HDs and dmg in the left hand list.

Good Luck to you.

Anyone with any ideas?

But when i go to disk utility i cant press any button's

this worked for me

http://www.makeuseof.com/answers/change-permissions-external-hard-drive/

Doing "Verify Disk" and then "Repair Disk" completely did the trick.

Had the same problem, and 'verify' from Disk Utility fixed it. YAY!

Thanks so much. I had a good laugh while reading the insults in this thread but it looks like you came up trumps....Well Done!

i try but the verify disk button is not highlighted or disable. what shall i do? thanks

Thank you, thank you! I was pulling my hair out. I used http://www.seagate.com/support/downloads/item/ntfs-driver-for-mac-os-master-dl/ and it worked like a charm. You're awesome!

https://www.youtube.com/watch?v=HCcw7NkALkM

For alooooong time I was trying to tale ownership of an external disk full of photos. Verifying worked like a charm. Thanks.

The original post says "changed" to read only. it means it was writable on the same laptop before. So no, clarifying the problem is not "hijacking".

Just used the link http://www.seagate.com/gb/en/support/downloads/item/ntfs-driver-for-mac-os-maste r-dl/

Works perfectly with my new Seagate external hard drive.

No need to format the drive.