It would be very useful if the proposed names of export files make distinguished, depending on the export of various resources.
I suggest to add some text to an existing name.
For example exporting host named 'TestHost', then the proposed name of the file such as:
zbx_hosts_export_(TestHost).xml

if exported to several hosts (up to 3), then you can list them within the parentheses (TestHost_TestHost2_TestHost3)

if more, then like so (totally_5) or something like that.
This applies to exports of different resources: hosts, templates, screens ...

A similar idea works in a Cacti and is very comfortable.
I hope the idea is clear.