I'm about to install a version of Ubuntu onto a 32GB flash drive, I've downloaded are Universal USB installer that will do most of the work for me, however, it asks
Step 4: Select a persistence option for your USB
and the options are
1GB CASPER -RW
2GB CASPER -RW
3GB CASPER -RW
4GB CASPER -RW
What is persistence? am I better off having more (ie 4GB) since my flash drive is a 32GB drive?