How to unpack an archive (without compression) from several parts if there is no space on the HDD on Linux?

Question

linux

There is a VDS on Debian, you need to unzip the backup on it. Backup It weighs 100 GB, it lies on this VDS, in total 120 GB are available on the VDS, i.e. free only 20GB. The backup archive is divided into parts, i.e. backup.tgz, backup.tgz.part1 ... backup.tgz.part950. Archive without compression.
How can it be unzipped?

Answer 1

Rent another same VDS from the same hoster for a day, put the archive there and mount it into the system, say, via sftp.

Answer 2

How can it be unzipped?

I would do something like this:

for f in backup.* ; do cat $f ; rm -f $f ; done | tar -x

Answer 3

It can be naturally mounted via archivemount