Sarah's external drive showed 2.4 gigabytes free and 12.6 gigabytes used. She decided to delete a folder of size 4.6 gigabytes and store new files of 2 gigabytes. If she will transfer all her files to a new external drive of size 20 gigabytes, how many free gigabytes will the new external drive have?
There were 12.6 - 4.6 = <<12.6-4.6=8>>8 gigabytes used after deleting some files.
Then, the used space went up to 8 + 2 = <<8+2=10>>10 gigabytes after storing other files.
Thus, the new 20 gigabytes external drive will have 20 - 10 = <<20-10=10>>10 gigabytes free.
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