If your ISO files are larger than 4GB they won’t fit on a FAT32 formated device which is what all USB drives come formated as.
Windows 7 has a tendency of adding things to Libraries. And the Libraries have a Share With option which is new and I think defaults to Read Only. See if your ISO file is noted in one of Win 7’s Libries; Documents, Music, Pictures or Videos,
And from another post these steps may help:
And from a friend named jaclaz :
Can you:
- try that same stick on another PC
- try another stick on that same PC
- try that same stick on the same or another PC with another OS (maybe a Linux LiveCD)
This would exclude *any*
**OS**or
**PC**specific issues and pinpoint the issue “inside” the stick.
With the Cruzer plugged in open a My Computer window and RIGHT click
on the device’s drive letter. Then click on Properties and report what
File System is shown.<br>
To verify the device is read only, in Windows open a Command Prompt and execute:
ECHO Hi, I am echoed to a text file\>?:\mynicefile.txt
replacing the ? with the cruser’s drive letter. Post the results shown in the Command Window.
Windows 7 has a new function called Libraries to which it can classify things automatically as Documents, Music, Pictures or Video. And within the Libraries there is a column called Share With. Check to see if your ISO file on the USB drive is a part of your Win 7 Libraries. If so use the Share With function to set it to Read/Write. See if that helps.
I had a USB drive get caught in that senario a while back, how I have no idea, but clicking on the Read/Write option made the device writable again.
