How to pass a file to Human Task or read it directly from HT?

Question

Java

I am developing a BPM application for electronic document management. I work with java, Oracle SOA and BPM, database - oracle database, application server - weblogic server. Everything is almost ready, but I can’t solve this problem: I need to transfer a file with barcodes to Human Task for printing. The file contains a large number of barcodes and weighs about 90kb.
When reading a file using the File Adapter service, the HT form is not created and writes a field overflow error in the database. The bytecode of the file is more than 4 thousand characters and does not fit into the database field.
I couldn't find the answer in the Oracle documentation.
If anyone has already encountered a similar problem or saw a solution somewhere on the Internet, help with advice.