Yes. You can most certainly save something that big to text file. I wouldn't say that is sensible.
There are three reasons for this:
1. Your data is huge (90MB) and as text, I'd expect it to be more than that. 2. It'll take ages to write. 3. How do you want to arrange your data? Its a 3-D table, at best, text gives you a simple 2-d table
A simple method for getting the data into a text file, is actually to use the "diary" function, (which makes everything printed to screen go straight into a text file), then just make your variable print to screen. The data will not be sensibly arranged, and it will be hard to read, but it'll be in a file which someone can eventually decide to read. .