If you just want to pass a string value from TestSuite#1 to TestSuite#2,
it would be much easier pass the data via local a JSON file.
TestSuite#1 writes a string into an ad-hoc JSON file, TestSuite#2 reads it
Creating, reading, writing JSON is easy. Far easier than working with Excel. See the following post:
However, I would still recommend you to merge your TestSuite#1 and TestSuite#2 into TestSuiteUnited where you use GlobalVariable to share the data as parameters. That’s the simplest and easiest.