Clip currupts from Source Browser

[walkabout]

I have tried to "Add and Transfer to Bin" some clips from a Hard Drive using Source Browser.
Of 62 clips 3 fail to come in, they start then go Red with a little black square in the lower left corner with a diagonal line with F/H in it and a white square top right with a diagonal line through it.
If I open the clips in Sony Clipbrowser I can see the clips and if I drag them across from the same drive they are fine?
However I need to get them into the project and not just link them if I use the drag method with Clipbrowser it only links.

Any ideas?

[GrassValley_BH]

Just in case... your project drive/folder still has lots of space, right?

[walkabout]

Yes, loads of space 2 TB.
It's strange I managed to get the 3 shots in by using "add file" from within the bin, it brought them in perfectly.
Just one of those things I guess "Source Browser" didn't like those 3 shots?