Hi,
> can I just copy the old mysql files into the reinstallation?
No.
The transfer of databases between different versions of MySQL or MariaDB should be performed by EXPORT / IMPORT of SQL files using phpMyAdmin or a similiar tools of your choice. Do not copy the data folder between different versions of MYSQL or MariaDB.
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Wampserver 3.2.9 32 bit - Apache 2.4.53 - PHP 8.1.5…5.6.40 - MySQL 5.7.38 - MariaDB 10.5.13/10.6.5
Wampserver 3.2.9 64 bit - Apache 2.4.53 - PHP 8.1.5…5.6.40 - MySQL 5.7.38/8.0.29 - MariaDB 10.5.15/10.7.3
PhPMyadmin 5.1.3 - MysqlDumper 1.24.5 on W10 and W7 Pro 64 bit
Documentation Apache -
Documentation PHP -
Documentation MySQL -
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