Data recovery operations are not comparable to repairs, which are based on attempts and passed on to professionals when unsuccessful. Any such attempt can result in a permanent loss of data, without the possibility of remedying it, regardless of the cost.
If you experience the malfunction of a memory or inaccessibility to data, avoid the temptation of do-it-yourself solutions or asking acquaintances for help. Instead, contact a computer repair centre to find out if a specialised data recovery laboratory is required to solve your problem, or request information directly.
For computer scientists from other sectors who are attempting data recovery on behalf of one of their clients, please be aware that in cases of faulty memories or simply of deleted data, specific professional tools, extensive experience and many hours of work are required. Without diminishing their competence in their field, we recommend accurately evaluating the possible consequences of a definitive loss of data as a result of attempts made without the necessary procedures and specific equipment. In any case, requesting information can prevent irreparable damage.