
If you've only ever used the eShop for game installations this should never happen, but of course there may be circumstance which I'm unaware of. Forcing you to halt the install and try again, leaving leftover garbage data. You encountered some generic, unexplainable error.Once you initiate a game install, there is no mechanism provided to stop it.
You turned off your console, or unplugged your USB storage device while content was installing.
You used tools such as WUP installer GX2, the y-mod variant (or similar tools), which can't identify currently available space on your storage medium and underestimated the size of a game ( thanks NSMBU + NSLU bonus videos). Why and when would this occur you may ask? You'll soon discover however, incomplete installs of such content will not be properly indexed by the normal data manager under system settings, making them absent from the list, and hence being unable to delete them this way. If you recognized something was off, you probably browsed through data manager and looked for the culprit. If this occurred multiple times though, you probably realized the bar indicating used space increased (or, an increase in OS load times, a side effect of having a close to full NAND). Depending on the size of the game, the amount of additional times you attempt the installation or how much of the installation was completed before the install failed, the reduced storage space may go unnoticed for awhile. Hi, this tutorial will walk you through the steps necessary to delete a game (update, DLC, etc.) which failed to fully install to the system NAND or connected USB storage device, using FTPiiU Everywhere. Click to expand.As pointed out in the replies section by Cylent1, before deciding to go through with this process, it is worthwhile to try the option the Wii U's built in data management menu prompts you with when/if it recognizes that there is an unfinished installation.