MokoJumbie created Redmine issue ID 8371
The File Browser should notify you if a file will be overwritten when uploading files. Currently, a file can be overwritten on upload without even a warning.
Going to test this today.
Able to reproduce this.
Tested this in MODX 2.5.5. When uploading a file with a name which already exists in the file manager, the system will tell you your upload was successful. When you refresh the file manager afterwards, you'll see that the existing file is still there and the file you uploaded 'successfully' is nowhere to be found.

Confirmed. #modxbughunt
Tested it in MODX 3.0 and it is still actual for MODX 3.0.
And actual for drag&drop packages in package manager.
You can see also on the demo in #13851
This problem is very relevant so far. Almost on all sites that i create, i have to make image renaming plugins to avoid duplicate names. At the same time, silent renaming does not work if you rename a file already uploaded to the server.
I reproduced on the current dev branch MODX 3.x. Any ideas for fixing this problem?

Silently overwriting doesn't seem good. A confirmation of overwriting the file would be the best UX here.
Rather than failing to upload or overwriting a file it should add _1, _2, _3 or similar to the filename of the duplicates. This is what most browser downloads do.
Improved in #15232
@modxbot close
Most helpful comment
This problem is very relevant so far. Almost on all sites that i create, i have to make image renaming plugins to avoid duplicate names. At the same time, silent renaming does not work if you rename a file already uploaded to the server.
I reproduced on the current dev branch MODX 3.x. Any ideas for fixing this problem?
