Our backup / export module allows to segment on CMS pages, categories, customers, orders, products and settings. You can export each part separately.
Make sure the date range is large enough. If you select the date of today, then you will only export the products and customers of today.
If too much data is exported at once it can happen that your computer has insufficient memory to display the file and therefore crashes. Large backups also provide extra load on our servers. Therefore, there is a limit of 1000 items per export. This way we also prevent that users do a full backup daily instead of an incremental backup.
If you want to export more data, perform the backup several times, each time with a different date range.