In the previous comment, It's mentioned to delete the recovery drive. Don't ever do that!! This will permanently wipe all your hope to recover PC from problems using the recovery drive. Next thing is, It'll hardly consume not more than 9 or 10 GB which is fare enough.
To create recovery drive on Windows 8.1, directly press 'Window' button + 'Q' and type recovery on the search text bar. From the search result option, click on the recovery drive and follow the on screen steps to create a bootable recovery drive. Also, make sure that you don't have any data on the targeted USB or flash drive as these steps will permanently wipes all your data.
Hope everything is clear now!!