Nope, it’s not practical and to be blunt, it’s downright dangerous.
Let me explain why that is and what I recommend you do instead.
Full versus incremental
Let me quickly review: a full backup is a backup of everything, period. It’s a snapshot of whatever it is you’re backing up. So if you’re doing a full backup of your drive, it’s a complete copy of everything on that drive. An incremental backup, on the other hand, is a backup of everything that changed since the last backup.
Let’s say, for example, you do a full backup on Monday; then on Tuesday you do an incremental backup, which will contain only those files that changed between Monday and Tuesday. Then on Wednesday, you do an incremental backup again. This time it will contain only the changes that occurred between Tuesday and Wednesday. You get the idea.
What you’ve done is exactly that, except you’ve repeated it 365 times in a row. Rather than copying everything, everyday, you’re only backing up a smaller subset: the things that changed. It is faster and it does take up less disk space overall. I do recommend that you do it; I just don’t recommend that you do it for as long as you have.
Here’s the problem: the incremental backups all rely on all of the preceding incremental backups. If any of the incremental backups are lost or damaged somehow, then all of the incremental backups that were taken thereafter are no longer valid. Each one depends on all of those that have been taken prior.
In a sense, it’s a house of cards. Lose the wrong one, and it could all come tumbling down.
So, for example, you take a full backup on January 1. You take a year’s worth of incremental backups, so you’ve got 364 of them (365 is of course the full backup). If you lose the incremental backup that was taken on, say, February 1st, then you’ll have lost access to everything that was backed up for the rest of the year.
My recommendation is a compromise; take a full backup about once a month, then do incremental backups every day. That’s exactly what I do.
If you do that for a year, that’s going to take up more disk space than the one full backup and 364 incrementals that you have now. So you’ll need to manage your disk space somehow.
A full backup and the incrementals that follow it are what I’m going to call a “backup set”. I keep two backup sets. Set #1 is the current one: the full backup and then any incremental backups that are currently being added to it for the month that I’m in. Set #2 is the previous month: the previous month’s full backup and then all 28, 29, 30, or 31 incremental backups that were taken that month.
Occasionally, I’ll actually squirrel away one of the monthly full backups, but that’s more of an archival thing than an actual backup thing.
To sum up, things are kind of risky with your one year’s worth of incrementals. Everything could work just fine. But to be honest, I’d really encourage you to change your approach.