You can get workfolder at backup console. Get destination folder and change backup as work for example.

export "SOURCESCHEMA"."*" as binary into '/workfolder' with replace threads 10;
import "SOURCESCHEMA"."*" as binary from '/workfolder' with rename schema "SOURCESCHEMA" to "TARGETSCHEMA";

If you get privilege error like “SAP DBTech JDBC: [258]: insufficient privilege: Not authorized”, edit your user at Security menu and add EXPORT/IMPORT System Privileges.

Change all table priority for unload in short time.

create procedure update_unload_priority() LANGUAGE SQLSCRIPT AS
CURSOR C_TABLE
FOR SELECT 'ALTER TABLE "' || TABLE_NAME || '" UNLOAD PRIORITY 9;' AS SQLTEXT
FROM SYS.TABLES
WHERE SCHEMA_NAME = 'MYSCHEMA' AND TABLE_TYPE = 'COLUMN' and temporary_table_type = 'NONE' AND unload_priority <> 9;
BEGIN
OPEN C_TABLE;
FOR cur_row AS C_TABLE DO
EXEC cur_row.SQLTEXT;
END FOR;
END;

You can convert all row table to column table with below procedure:

create procedure convert_column() LANGUAGE SQLSCRIPT AS
CURSOR C_TABLE
FOR SELECT 'ALTER TABLE "' || TABLE_NAME || '" COLUMN;' AS SQLTEXT
FROM SYS.TABLES
WHERE SCHEMA_NAME = 'SAPABAP1' AND TABLE_TYPE = 'ROW' and temporary_table_type = 'NONE';
BEGIN
OPEN C_TABLE;
FOR cur_row AS C_TABLE DO
EXEC cur_row.SQLTEXT;
END FOR;
END;

You can execute below procedure like this:

CALL convert_column;

You can use below procedure for unloading all column tables in Hana.

create procedure unload_all() LANGUAGE SQLSCRIPT AS
CURSOR C_TABLE
FOR SELECT 'UNLOAD “' || TABLE_NAME || '”;' AS SQLTEXT
FROM SYS.TABLES
WHERE SCHEMA_NAME = 'MYSCHEMA' AND TABLE_TYPE = 'COLUMN' and temporary_table_type = 'NONE';
BEGIN
OPEN C_TABLE;
FOR cur_row AS C_TABLE DO
EXEC cur_row.SQLTEXT;
END FOR;
END;

You call this procedure like below:

CALL unload_all;