Are External Drives Affected by Write Permissions?

I was wondering, if I get a flash drive or external hard drive, will it be affected by the write permissions, preventing me from running games from it? The computers I use usually have write permissions disabled on all the drives and folders I've checked, and I was trying to use a portable version of Steam through Cameyo, which is a portable application program, and it is blocked by write permissions. So, if I used an external hard drive, just assuming these computers are extremely strict, would I be able to use it and not be prevented by the write permissions? I know this depends on the circumstances of the PC, but basically, is there a way that the computers could have a blacklist or a whitelist on write permissions? Part of the PCs use Windows 7, and the others use XP. Thanks.
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  1. Best answer
    Yes, particularly in Windows 7 external write permissions are often disabled. While you may or may not encounter the problem it isn't really a big deal if you do.

    There are two basic ways to fix the issue:

    Login as an administrator on the computer. Open regedit.exe by typing that in the start search box. Navigate to this key:
    You might need to create the key StorageDevicePolicies if it does not exist yet.
    Select the StorageDevicePolicies key with a right-click into the right window.
    Select New > Dword (32-bit) Value from the menu and name the new entry WriteProtect.
    Double-click the new WriteProtect key and change the value to 0. If you want it to be read only you can change it back to a value of 1.
    Save the key changes by clicking OK after each.
    Restart your computer and then attach and test the USB device.

    There is one other thing that I use if that fails in Windows 7 (older versions use a different syntax), and it has always worked. Plug the device in, perhaps into a different USB port, then use diskpart to change its attributes:

    Open the command prompt box with right click and run as administrator

    Type each of these commands one at a time in this order:
    list volume
    select volume n (where n = the problem volume)
    attributes disk clear readonly
    attributes volume clear readonly

    After each of the last two you should get a response that it was successful.
  2. Awesome thanks.
  3. Best answer selected by Dog G6.
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