- I have no accent (french) - Not utf8 ?
Be sure you're opening the CSV file as UTF8. For example with LibreOffice the encoding is asked at time of opening and you need to be sure to select UTF8.
- In case of "number of user display (20 for example) is less that the total of users (100 for example)", I have for example 1 2 3 4 5 at the bottom of my list.
If I click on 1 or 2 or ....., the Export runs 'alone'
It only exports the users you've selected.
- the maximum of number of user display is 5000. If my number of user is more than 5000, how to export in one file the whole database ?
You can't, it's not meant to export your entire database; use your database for that.