Time Machine Troubles....
I am finding that when I go into time machine to search back for a file, after going a day or so back all the windows go blank, like there is nothing there. There is nothing to search or restore. It's very strange. The other day I went back a ways and tried to restore a file and the restore button was greyed out. There was no way to restore. Then when I went to try again I got the blank window. Sometimes files are even there and then pop off and that's it. Nothing. All the way back to 2016. I thought to try to run Disk Utility but I could not access the time machine drive. I mean, it could see the drive but it would not allow me to unmount and run first aid on it. It said the drive was busy. I shut down, restarted, everything. Same message. Yet, every day Time Machine tells me it's done a successful new backup at the scheduled time, but I am not really feeling I can trust that this is actually being done and that my files are safe and would be accessable if I needed them. I think I need some help to feel comfortable with Time Machine again.
iMac 27″, macOS 10.14