You will still have full functionality of your Unleashed account whilst a CSV import is being uploaded. However, if you are making lots of data changes with the import, we recommend uploading it during off-peak hours to ensure the uploads are completed as efficiently as possible and that your users are using the most accurate data in Unleashed.

We would also recommend only uploading one import at a time. This will help to ensure each upload is imported successfully and updates the appropriate records in Unleashed, ready for the next import to be uploaded.