Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
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?

### Response:
 Nafasi iliyotumika ilikuwa gigabaiti 12.6, kwa hivyo nafasi iliyobaki ilikuwa gigabaiti 20 - 12.6 = <<20-12.6=7.4>>7.4 gigabaiti kwenye diski ya zamani.
Baada ya kufuta folda yenye ukubwa wa gigabaiti 4.6, nafasi iliyobaki itakuwa gigabaiti 7.4 + 4.6 = <<7.4+4.6=12>>12 gigabaiti kwenye diski mpya.
Baada ya kuhifadhi faili mpya zenye ukubwa wa gigabaiti 2, nafasi iliyobaki itakuwa gigabaiti 12 - 2 = <<12-2=10>>10 gigabaiti kwenye diski mpya.