Pas d'icone My Cloud dans l'onglet réseau rubrique ordinateur sous Windows 10

First do you have a My Cloud or My Cloud Home device. They are not the same device. Generally one uses the WD Discovery program for the My Cloud Home. For the My Cloud one would use WD Access which can be downloaded from the My Cloud Download page.

Microsoft may have disabled SMB 1.0 when you reinstalled Windows 10. One would need to re-enable SMB 1.0 within Windows 10. There may be additional settings one may have to reconfigure within Windows 10 for the My Cloud to appear in Windows File Explorer. See the following discussions which have suggestions on what to check (and possibly change) in Windows 10 when the My Cloud is not being seen in Windows Explorer.