How can you resolve this annoying problem on your machine?
This post fromMiniToolgives you answers.
However, this software may cause diverse issues, such as constantcrashing, file missing, and others.
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This post focuses on one of them:After Effects file couldnt be opened for writing.
In general, this error occurs because of insufficient free storage space, no permission, etc.
The following content explains three ways to address the problem.
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If you get such a prompt repeatedly, dive into the detailed three ways with our guidance.
Wondering how to fix the AutoCAD drawing file is not valid?
Read this post to learn the causes and solutions for the error.

Solution 1.
PressWin + Eto open File Explorer.
Right-hit the folder and chooseProperties.
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Change to theSecuritytab and clickEdit.
In the following window, you should choose the current account under theGroup or user names.
Then, check the permissions for the folder.
If there is any check mark under theDenycolumn, untick it to grant permission to the folder.
ClickApply > OKto save the change.
Therefore, freeing up the disk space can resolve this problem.
PressWin + Rto bring up the Run window.
Typecleanmgrinto the dialog and pressEnterto launch Disk Cleanup.
Step 3. opt for target disk and clickOK.
Choose the files it’s crucial that you delete from theFiles to deletesection and clickOKto confirm.
you’re able to delete the cache files of After Effects to obtain more free storage space.
Read the specific information about thememory and storageof After Effects through this post.
But, do you know what is safe to delete in Disk Cleanup?
Now, you might read this article to get the answer.
Solution 3.
Several people have successfully resolved the (3::0) error via this method.
Three methods are explained in total with specific steps.