I’ve just been attempting to import a character model in fbx format as I have done several times before but for some reason everytime I go to import it I get a disk drive error and have to force close UE4 anyone know why this could be happening? I’ve tried it with several projects, blanks and templates, same issue.
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I had this same error for me it was because I had the engine installed out side of my c drive and maybe because I had two versions installed one on my c other on my d drive. My c drive was full and so I installed a new version on my d drive when I launched the engine it threw that error. If this is your case just uninstall and reinstall to your c only.
No I only have 1 installation which is located on my E drive, I don’t have an F drive at all which it seems to be indicating is the problem.
-have you already tried it with another engine version?
-start the engine with “admin rights” 
-go to the PC tab where you can see all your disk drives -> check if you can probably find a “F”
-have you already tried to import another fbx file?
Yes
Yes
Found Nothing
Yes
Sorry to say none of these fixed the issue
Post your problem on answerhub: https://answers.unrealengine/
Could you upload the fbx file so that we can see if it’s probably because of the file (got nearly the same message in blender -> in the end I found out, that the file was somehow corrup)
Hi Charlie,
Can you take a look at this AnswerHub post, two developers reported that they were able to fix this by doing those steps: https://answers.unrealengine/questions/72804/ue4editorexe-no-disk.html
If you’re still having the issue feel free to post on AnswerHub in the Bug Reports section and we’ll gladly help.