Meadow Lark

Is Spinrite better than Recuva for .mp4 and .mov files? I'm just really concerned because it only happened after I deleted the project cache files in DavincI Resolve. Before trying Recuva, whenever I tried to safely remove the external hard drive it would say can't remove because it's in use with another program. I opened task manager to make sure all applications were closed and they were. I shut down my computer. Waited a few minutes. Removed the external hard drive and tried it in another computer. Same issue. Said it's open in another program, etc. I did a deep scan in Recuva and tested a recovered video .mov file and a .mp4 file and they won't play back on any of my players. Windows media player. VLC media player, or QuickTime player. I'm planning to buy another hard drive tomorrow to put the Recuva files on before I try anything else. Unfortunately that was my Christmas present spending money. Now I have to spend it all on a new hard drive. Thanks so much for your advice.

It looks like I might have a bigger problem. All my videos files were stored on my external hardrive along with other important files! Suddenly I can't view any of my files on my external hard drive. Is this a common issue with Davinci. Does this software destroy hard drive files? Any recommendations?

How do I update thumbnails?

Using the latest Davinci Resolve 15 Free software on my PC. I opened a previously saved timeline for a wedding video highlights. I hoped to open it to make a few minor adjustments before I do one last render. All of the clips said Media Offline. All clips are red. I haven't done anything different. All of the original video clips are still in the same place unmoved, untouched and working fine. I have lots of storage too. I tried to clear the cached render but still no changes as suggested in a forum topic similar to my issue. It still shows No Media errors in all editing rooms - fairlight, color, etc. It won't play anything when I try to scrub or play. Any suggestions? I'm really disappointed in all the issues I've had to waste a lot of time troubleshooting in this program. I don't have a lot of time to spare with editing deadlines to meet. Please help. Thanks in advance.