Open File Explorer and select the file or folder you want to have full permission to right-click it. Choose Properties. Go to the Security tab. Click Advanced. On the next page, click Change. Then click Advanced. On the Select User or Group page, click Find Now. Then select your user account and click OK. On the Select User or Group page, click OK. Click Apply, Then click OK. You can refer to the post How To Take Ownership Of Folder In Windows 10 By Yourself to learn more.