aws sync doesn't download the file and instead create an empty directory

Question

The file I'm trying to download is:

s3://ont-open-data/gm24385_q20_2021.10/analysis/20210805_1713_5C_PAH79257_0e41e938/guppy_5.0.15_sup/align_unfiltered/chr19/calls2ref.bam

This is an open dataset. I followed the tutorial here: https://labs.epi2me.io/tutorials/. The command I used was:

aws s3 sync --no-sign-request s3://ont-open-data/gm24385_q20_2021.10/analysis/20210805_1713_5C_PAH79257_0e41e938/guppy_5.0.15_sup/align_unfiltered/chr19/calls2ref.bam destination.bam

However, instead of downloading the file, aws simply created an empty directory named destination.bam, which makes no sense...

$ aws --version
aws-cli/1.15.15 Python/3.6.10 Linux/4.4.0-210-generic botocore/1.10.15

Answer 1

Couldn't solve the problem with sync, but I realized that cp works! The following command downloaded the file:

aws s3 cp --no-sign-request s3://ont-open-data/gm24385_q20_2021.10/analysis/20210805_1713_5C_PAH79257_0e41e938/guppy_5.0.15_sup/align_unfiltered/chr19/calls2ref.bam destination.bam