An electronic archiving with probative value needs a structured approach.
External or internal, the implementation of an electronic archiving system requires an archiving policy.
To archive or to get a safe deposit box with probative legal value, PDF documents, once time-stamped, signed and sent, are managed by a trusted third party. This authority respects Z42-013 norm and is ISO 27001 & 14001 certified, part of FNTC TA with a special certification on Public archives & Medical Documents.
A storage service is also available, for big volumes or for instance, to create a personal safe deposit box for an employee (payslips).