It would appear that English is not your native language. You may want to try a service like Google Translate and type your questions in your native language and then post the translated question.
Forum users will try to help you, but you need to provide details about what you did. Please remember, we cannot see your screen. So when you say "I share a file", well, we don't exactly know what you did or what information you provided to your users.
There are many tutorials on the internet that demonstrate the steps to share files/folders. Have you viewed any of these?
https://www.bing.com/search?q=windows+file+share+tutorial
In a business environment, you would typically share out folders and grant users the appropriate access to both the share permissions and the file/folder permissions.
Is this an Active Directory enviroment or are you using local accounts?
You need to provide specific details about what you are doing in order for someone to be able help you.
Here is a Powershell script that will enumerate your shared folders and will show the share and folder permissions. Do you see your share name listed?
Get-SmbShare | Where-Object -Property Name -NotLike '*$' | foreach { # exclude hidden and administrative shares
"----------------------------------------------------------------"
"Share permissions for {0}." -f $_.Name
$_ | Get-SmbShareAccess | Format-Table -Property AccountName, AccessControlType, AccessRight
""
"NTFS folder permissions on {0}." -f $_.Path
(Get-Acl -Path $_.Path ).Access | Format-Table -Property IdentityReference, AccessControlType, FileSystemRights -AutoSize
}
You can also use Computer Management to view your shares.