Yes you can export records as csv files from inside most modules. For example go to accounts and tick the checkboxs of some of the records on the list view. There is a small dropdown menu next to the deleted button which should have the export option in it. This will create a csv file with those record you checked in it. You can then import those into another instance of Suitecrm using the import wizard.
I have an issue about the “employees” data.
On my new crm, I already have some users.
Do I have to take back the id data from the old sugar and copy them to the new one ?
Because each employee got an ID, and each contact/account seems linked to these id.