This is where most users fail. The e-STUDIO2505F does not scan to email or folder via SMB without the driver's helper utility.
Fix for "Scanner Not Found": The 2505F scan driver uses legacy RPC over USB. If your PC goes to sleep, the USB stack resets, and the scanner disappears. You must restart the "Windows Image Acquisition (WIA)" service or reboot. toshiba studio 2505f driver
If you cannot find the official Toshiba Studio 2505F driver, you have backup options: This is where most users fail
Warning: Generic drivers will not enable scanning or faxing. They are a temporary workaround only. Fix for "Scanner Not Found": The 2505F scan
Because you are using a .STUDIO device, your region matters.