Safe Data Migration When Rewriting Legacy Software

By P-Soft Expert Team October 5, 2026 4 min read

When you convert your legacy software to a web-based system, the data you have accumulated over the years is not lost — with a proper migration process, all of it is transferred to the new system completely and securely. The number-one fear organizations have when rewriting software is exactly this: “Will I lose my data?” With a correct migration plan, the answer is a firm “no”.

What is data migration?

Data migration means transferring all of your legacy software’s information — customers, products, invoices, financial records and every other record — into the new system’s database structure, completely and with the relationships between records preserved. It is not just “copying”: the data must be cleaned, mapped and validated so it works correctly in the new system.

The steps of safe data migration

Audit & extraction: the legacy data structure (even if it is Access, FoxPro or old flat files) is analyzed and the data is extracted.
Cleansing: duplicate, incomplete or corrupt records are identified and fixed so “garbage” is not carried into the new system.
Mapping: each old field is mapped to its corresponding field in the new database.
Trial migration: a test batch is migrated first and compared against the source data.
Validation: record counts, financial totals and samples are checked to confirm 100% accuracy.
Final migration & go-live: the final transfer runs during off-peak hours and the new system goes live.

How do we ensure data is secure and accurate?

Full backup before starting: the legacy data is backed up so there is zero risk.
Parallel migration: the old software stays live until final sign-off; there is no interruption to your work.
Reconciliation report: after migration, a comparison report of source vs. destination data is provided.
Encryption in transit: data is encrypted while being transferred.

Which data can be migrated?

Almost everything: customer and supplier records, inventory and products, invoices and financial documents, transaction history, users and permission levels, and even attached files. Even if the legacy software has no standard export, the technical team can extract the data directly from its database.

Barsavosh Fanavaran’s software rescue & migration service

In our legacy-software-to-web conversion and rewrite service, safe data migration is an inseparable part of the project; we transfer, validate and guarantee your data in full. Related guides: Rewriting Legacy Software: When, How & Cost and Converting Access & Excel to a web app.

FAQ

Will I lose my data when the software is rewritten?

No. With a full backup, a trial migration and record-by-record validation, all data is transferred to the new system completely.

What if the legacy software has no Excel or standard export?

No export is needed; the technical team extracts the data directly from the legacy database (even Access, FoxPro or old SQL).

How long does data migration take?

Depending on the volume and complexity, from a few days to a few weeks; but because migration runs in parallel, your day-to-day work is never stopped.

Is the organization’s work interrupted during migration?

No. The old software stays live until the new system’s final go-live, and the final transfer runs during off-peak hours.

Related services

P-Soft (Barsavosh Fanavaran) Expert Team

This article was written and reviewed by the enterprise-software specialists at Barsavosh Fanavaran (P-Soft) — makers of products such as Hamkhoneh, Avadar, Nooradio and Hamahang.

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