After uploading a static resource to a SF sandbox through the website, my entire team was unable to pull from the sandbox using Welkin. We were able to pull the files using the Eclipse IDE, but from Welkin we received an error message with the possible causes: 1) insufficient permissions, 2) local drive is full, or 3) file is being used somewhere else.
We tried creating new project and downloading the sandbox afresh, but the result was that no Solution file (.sfsln) was created. There was a .sfproj file, and all the classes, metadata, etc. were downloaded successfully. Even the static resource that caused the problem was downloaded (SEE ATTACHMENT). However, there were some unusual residual files left out of folders in the project folder (SEE attachment: the two unnamed css/js files and those labeled ".min").
After deleting the static resource in SF, we were then able to pull. The static resource was downloaded from the Bootstrap website and uploaded directly, without modification (so it seems it is not a problem with the files themselves).
Any help with this issue would be much appreciated.