Hi Raphael,
Good day to you.
We would like to inform you that, by default we have provided support to upload all type of files in file manager. You can change or restrict the uploading files in file manager by using uploadSettings property. For your reference, we have prepared a simple sample in the link:
To run this sample, download the file provider and run it. In above sample, you can upload all type of files in file manager.
Still if you have faced issues, kindly share the below requested details will be more helpful to provide the solution at earlier.
a. Issue reproduced sample (if possible)
b. Syncfusion packages version.
c. Have you tried with local service or our online services?
Please let us know if you have any queries on this.
Regards,
Ashokkumar B.