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[Kal_Lam]

@Sira, maybe this post discussed previously should help you solve your issue:

Kobo Account Storage

Welcome to the community, @chesaro! It’s always advised to upgrade your account as needed. If you have exceeded the storage threshold (1GB per account), then you could simply purchase the storage add-ons. If you do not wish to purchase the storage add-ons, you could delete the submissions holding the media files to free up space. Feel free to reach us at support@kobotoolbox.org for any issues related to your subscription. We would be happy to provide more details there.