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I believe you are referring to the upload file size limits on an upload field, which are by default set to 1024kB.
You can change this limit on any of our subscription plans, by simply clicking on your Upload field, and changing its Max File Size value:
Please take a look at the following guide for more details about changing file size limits on your upload fields:
If you need any further clarifications or assistance, please let us know. Thank you.