Storage in the free plan is very small, I think 100MB is too little.
In free plans for example: Airtable offers 2GB of space, Freedcamp storage unlimited with a maximum of 10Mb per file, Evernote offers 60MB per month, Notion 5MB per file but without upload limits (to name a few platforms even though they are not related to clickup).
With the potential of ClickUp, it could be a bit more generous for people who haven't yet been able to switch to the paid plan.