Catia not opening older files ERROR: Cannot open document due to data storage versionning

I'm following a molding tutorial from youtube, the uploader was working on catiaV5 2018
when i downloaded some files provided by him, they can't be opened and this error popped
"Cannot open document due to data storage versionning"
I'm working on a later catia version (2021), any help on how to fix this problem
Accepted answer

You should be able to open 2018 files with your 2021 CATIA system. The files in error are probably newer (higher) than your 2021 release.
CATIA is not upward compatible, meaning your CATIA system must be the same version/release or higher than the the version/release used to make the CATIA file.
There are several solutions/options:
1. Upgrade your CATIA installation to the same or newer release level.
2. Contact the source of the file, and ask them to convert the CATIA file to the lower (older) release that you are running. Or convert the file to the STEP format.
3. Make your own files that are compatible with the tutorial
2 Other answers

The best way to respond to the "Cannot open document due to data storage versioning" error in Catia is to address the version compatibility issue directly. Here's a clear and concise response you can use:
Solution: https://8171ehsaasrashan.click/
The error you're encountering typically happens when you're trying to open a file created in a newer version of Catia in an older version of the software. To resolve this, try the following steps:
Upgrade Your Catia Version: If possible, upgrade to the latest version of Catia that matches the version used to create the file. This should resolve the compatibility issue.
Use "Save As" to Downgrade File Version: If you have access to the newer version of Catia, open the file and use File > Save As to save it in a format compatible with your version.
Check for Updates: Ensure that your Catia installation is fully updated, as sometimes versioning issues can be caused by outdated software.
Collaborate with the File Creator: If the file was created by someone else, ask them to save it in an older version or share it in a neutral format that your version supports.

The error **"Cannot open document due to data storage versioning"** typically occurs when you try to open a file created in an older version of CATIA (like V5 2018) in a newer version (like V5 2021). This issue arises because CATIA's file format and data storage structure may change between versions, and newer versions may not fully support files from older versions without proper conversion