Hi @vsivaraman81 ,
Please set the Output property of read text Activity to store the value read from the file,
In the field you can create a variable to store using Ctrl+k
You can use the Write text File Activity to Write the Value from Read Text Activity.
Attaching the official documentation of those 2 for your ref.
Activities - Write Text File (uipath.com)
Activities - Read Text File (uipath.com)
Happy automating.
Thanks,
gautham.