my external hd won't let me change the access privilege for disk?

[tbluhp]

My disk won't write to I only have ability to read to but as of yesterday it was at the correct level of read write (777) how do you fix this when there is no options to in the get info "sharing" section?

 

[simsaladimbamba]

Can you unlock the settings via the small lock on the bottom right?
Can you add a user (Everyone) and change permissions?

 

[tbluhp]

Can you unlock the settings via the small lock on the bottom right?
Can you add a user (Everyone) and change permissions?

no

 

[simsaladimbamba]

no

No to what question? The first or the second (the second can't be done without the first)?
Can you post screenshots and attach it here?

How to attach an image to your MR post.​

 

[tbluhp]

No to what question? The first or the second (the second can't be done without the first)?
Can you post screenshots and attach it here?

How to attach an image to your MR post.​

Here is the screenshot

 

[simsaladimbamba]

What format is the HDD using?
Check via Get Info:

 

[tbluhp]

it's windows format only because I need to use my hd's on a pc sometimes.

 

[GGJstudios]

it's windows format only because I need to use my hd's on a pc sometimes.

NTFS (Windows NT File System)

• Read/Write NTFS from native Windows.
• Read only NTFS from native Mac OS X
  [*]To Read/Write/Format NTFS from Mac OS X: Install NTFS-3G for Mac OS X (free)
  
• Some have reported problems using Tuxera (approx 33USD).
• Native NTFS support can be enabled in Snow Leopard, but is not advisable, due to instability.
• AirPort Extreme (802.11n) and Time Capsule do not support NTFS
• Maximum file size: 16 TB
• Maximum volume size: 256TB