Hi guys!

I was wondering where the datasets downloaded by AnnotationHub are locally saved. I was practicing with different datasets and I realized that there is only 6GB of free space on my drive C. I have two questions:

1. Where the datasets are downloaded and how can I clear those files?
2. How can I change the default path used by AnnotationHub so I could save the downloaded data elsewhere.

I would appreciate it if you could help me with this problem.

You can find the current location of you AnnotationHub cache with hubCache() e.g. for me that's:

ah <- AnnotationHub::AnnotationHub()
AnnotationHub::hubCache(ah)

## [1] "/mnt/data/AnnotationHub"

You can clear the entire cache with removeCache() or individual records with removeResources(). There's a section in the Troubleshoot The Hubs vignette that details how to move an existing cache, so you don't have to download everything again if you already have a lot of resources.

Personally I choose to use a different location by setting the environment variable ANNOTATION_HUB_CACHE=</my/annotationhub/cache/location/>. Exactly how you should do that depends on what operating system you're using. One option is to include it in your ".Rprofile" file.