Can I record an 8gb file in a dual layer DVD?



Hello. I’ve got an 8gb file I want to clear from my HDD. I’d like to record it into a dual layer DVD. I’ve never used them before because the price exceeds buying 2 single layer DVDs.
Still, I’m not very sure about it because the CD/DVD filesystem accepts only files up to 2gb. If I cannot record the file as a whole to the DVD and it must be split then it’s worthless to go for the dual layer.

How can I know before buying it?