Thank you so much, but I canāt open it on my phone. I donāt know why I deleted the zeros at the end and it still wonāt let me open it. Iām sorry I am technology challenged
You don't have to change the file extension whatsoever:
If you have the right tool (on desktop or laptop) or app (in your case because you are on mobile), the file will open regardless.
On PC you can use 7Zip, Winrar, ARK and other Archive-Programms to open the .001-file. Since the tools will know, that the .001-file is only the starting part of multiple splitted files, it will show you everything that is stored from the 001-file to the 00n (last part, however much will be there). So you don't have to open the files independently, just open the -001-file as long as you have every part in the same directory and you should be golden.
Regarding mobile phones I'm not able to tell you, which app exactly supports these multi part archives, since I'm
not a
mobile first guy. But be aware, that on mobile you have to have every part in the same directory, too, when you want to open it. Same procedure as written above.
I hope for you, that some mobile first user will be able to recommend to you an app, that has the capabilities.