By default, PlateSpin Migrate sets a 64 MB upload limit for each individual post-migration action, including its dependencies. See Managing Custom Actions.
You can increase this limit by modifying the configuration setting on the PlateSpin Server’Web configuration tool.
IMPORTANT:Decreasing the default size limit might have a negative impact on the stability of your PlateSpin Server.
From any Web browser, open https://Your_PlateSpin_Server/platespinconfiguration/.
Locate and edit the setting that defines the value of the httpRuntime element’s maxRequestLength attribute:
Replace the existing value with the required new value in kilobytes. For example, to increase the size to 16 MB, replace 8192 with 16384:
Save your settings and exit the page.