hi,
when you say disk, do you mean floppy, CD-Rom or hard drive? Sometimes when
these items become "Full" or almost full, the files automatically become
"read-only" as the storage system is not able to write/store any more data.
Sometimes on CD, the files become read-only depending on the type of CD-disc
you are using and/or how you are WRITING/recording to the disc.
Particuliarly with CD, the discs become read-only depending on the way you
chose to write/record to the CD. Check your CD set-up and see if you can
write without closing the CD that will allow you to continue saving files to
the CD and allow your files to be "editable".

"canieleader" wrote:

When I copy a file to disk that is not read only it becomes read only and I
can't change it in the properties. Why is this and what can I do to fix this
problem?