Yes, there are limitations in the trial version. The following limitations apply:
- You can only upload files to 5 records at a time.
- The trial version does not allow uploading files to List View.
- The Advanced Search(SOQL) feature is not enabled for trial users.
PS: View Mass File Upload, Salesforce file upload app, on Salesforce AppExchange: https://appexchange.salesforce.com/appxListingDetail?listingId=82cf236b-1ee8-4ea7-aebf-fd0c89fb93bd