GA4 is designed for another reality.

[shaownhasan]

To save your UA data with exports, you will have to do the following:

Make a checklist to make sure you don’t miss backing up vital information.
Export all UA reports with all possible combinations of dimensions, metrics, data ranges, segments, visitors and so on.
Organize these files in folders to not waste even more time finding the data in the “backup”.
Do the same monkey work for all the other UA views of your GA property.
Rinse and repeat. Do this for all sites you own, or chinese overseas australia data manage for customers.
Grumpy cat meme google analytics
So, is exporting the reports to XLSX or Google Sheets a better alternative?

The ease and ouch of exporting UA spreadsheets
You can export UA data as spreadsheets for MS Office and Google Sheets.

The .XLSX files are downloaded to your device.

Google Sheets can be created directly on your Google Drive. But for every single file, you need to confirm that you allow UA data to be imported.