"Lossless" HQ set for Forge for Android (and other versions)

I have a mostly lossless set of HQ (300dpi) card images that have been reduced in size from 17GB to 5GB. I cannot notice any real reduction in quality, although I am sure there is some if you look really hard. It is infinitely higher quality (and easier on the eyes) than the the LQ set the android app downloads for you.
I was wondering, what is safest way to share them? I was tired of dedicating 17GB of storage on my Android phone to just the card pictures, but the LQ set was unacceptably bad. So this seems like a happy medium.
I also don't want to bring unwanted attention to this forum, project etc. I can share a link to the zip file safely via Mega, but wanted to ask what the correct protocol was before proceeding.
I was wondering, what is safest way to share them? I was tired of dedicating 17GB of storage on my Android phone to just the card pictures, but the LQ set was unacceptably bad. So this seems like a happy medium.
I also don't want to bring unwanted attention to this forum, project etc. I can share a link to the zip file safely via Mega, but wanted to ask what the correct protocol was before proceeding.