What practical ways can I reduce the filesize of Logos?

Hi, Luke. Welcome to the Logos forums!

Your screenshot didn't show up. Use the paperclip icon.

But I can tell you how you can isolate the videos and remove them from your computer:

Open the Library (Ctrl+L, or Cmd+L on a Mac)

Type in this text in the "Find books" box:  type:media video

(that will filter your library to show just the "Media Collections" and "Courseware Media Collections" which are actually videos; if you leave off the word "video" you'll also find audio resources and image libraries, etc.; you might want to remove those too, but you might not).

Now select all the resources that appear by clicking anywhere in the list of videos, on any field except the title or the cover image, and then pressing Ctrl+A (or Cmd+A if you're on a Mac).

Now hold down the Ctrl key (or Cmd if on a Mac) and right-click anywhere in the selected area. This menu will pop up:

You can choose either "Hide these books" or "Remove from this device" (odd inconsistent wording of those commands, but never mind that, even though these aren't technically "books" -- Logos recently renamed the more generic word "resources" to "books" in most of its UI; here was one mistake where they should have left it alone).

"Hide..." will hide from you the fact that you own the license for them and will remove them from both this device and any other devices you use Logos on, though you can always unhide them at some point in the future (if you can find them in the Hidden Books section of your Program Settings; easy enough if you've only hidden a few items, but gets tricky if like me you've hidden thousands of books).

"Remove from this device" will remove them just from this device but leave them on any other devices you use Logos on.

You might need to restart Logos for this to take effect.

Hope that helps!

Hey, thanks so much for the help.

That's given me 1GB more at least. The rest must be something else. All media I removed.

The Index (which is necessary for all your searches to work and gets rebuilt whenever you add more books to your library) takes up about 50% again as much space as all your books combined. So if you had 10GB of books, the index would bump that up to 15GB. Also remember that the books aren't "just" text. They contain all the formatting and tagging, and many of them have images embedded too. And there are all sorts of datasets that take up space. You can hide more books you're not using if you are still concerned about all the space your Library takes up. But hard disk space is pretty cheap these days. How big is your HD? A 500 GB drive is pretty standard these days, and even 1 TB isn't that expensive ($65 or $70), and even 2 TB is exceedingly reasonable at about $90. Logos's website says their minimum system requirements include 30GB of available disk space, and that is a minimum, so it will grow as you add books to your library. I doubt you'll be able to get it much smaller than that for very long. So if you are running tight on disk space, look for other software that you don't use to uninstall, or consider upgrading to a bigger hard disk, or adding a second drive if you've got a spare drive bay (if you're on a desktop computer). If you're on a laptop with a tiny hard drive (200 GB or less) you might be in a tough spot, because it's not easy to upgrade hard drives on those.