My Passport Ultra 1TB Has Space But Won't Copy Files

So I was copying some files to transfer from one laptop to another and in the middle of copying the process froze and the speed went down to 0/kbs. It seems like I’ve hit the capacity limit because I removed some files and was able to transfer more onto it, but it still froze at a certain point. The problem is I apparently have about 130gb of space left. I’ve checked the quota settings in case there was a default setting, but it’s turned off and I also did a disc cleanup in case somehow there was 100gb of removable files, but nothing came up. I’d appreciate some help figuring out why there seems to be an invisible cap on file space.

Hello, does this always happen with the same file? I would also check the drive with the DLG for Windows to make sure that the drive is healthy.