クラウドストレージと自作ドライブ、本当に安いのはどっち？
Published: 2026年7月15日
Pulling live prices…
Live data across PricePerGig listings. Prices may change; Updated every few hours.
📊 As of August 29, 2026, the typical HDD on Amazon.com is $123/TB or $0.123/GB across the 5,515 live listings we track, with the widest choice of drives priced around $37.7/TB or $0.038/GB. The best deals on Amazon.com start from about $260 for 8TB ($32.5/TB), $340 for 14TB ($24.3/TB) and $590 for 20TB ($29.5/TB). The current best value is 14TB at roughly $24.3 per TB.
📊 As of August 29, 2026, the typical HDD on eBay.com is $112/TB or $0.112/GB across the 12,086 live listings we track, with the widest choice of drives priced around $101/TB or $0.101/GB. The best deals on eBay.com start from about $180 for 8TB ($22.5/TB), $299 for 14TB ($21.4/TB) and $499 for 20TB ($25/TB). The current best value is 10TB at roughly $19 per TB.
📊 As of August 29, 2026, the typical HDD on Newegg.com is $98.6/TB or $0.099/GB across the 1,172 live listings we track, with the widest choice of drives priced around $41.9/TB or $0.042/GB. The best deals on Newegg.com start from about $325 for 8TB ($40.6/TB), $489 for 14TB ($34.9/TB) and $810 for 20TB ($40.5/TB). The current best value is 14TB at roughly $34.9 per TB.
📊 As of 29 August 2026, the typical HDD on Amazon.co.uk is £160/TB or £0.16/GB across the 3,460 live listings we track, with the widest choice of drives priced around £44.1/TB or £0.044/GB. The best deals on Amazon.co.uk start from about £285 for 8TB (£35.7/TB), £322 for 14TB (£23/TB) and £614 for 20TB (£30.7/TB). The current best value is 14TB at roughly £23 per TB.
📊 As of 29 August 2026, the typical HDD on eBay.co.uk is £95.4/TB or £0.095/GB across the 10,807 live listings we track, with the widest choice of drives priced around £26.8/TB or £0.027/GB. The best deals on eBay.co.uk start from about £200 for 8TB (£25/TB), £309 for 14TB (£22.1/TB) and £500 for 20TB (£25/TB). The current best value is 18TB at roughly £18.2 per TB.
📊 As of 29 August 2026, the typical HDD on Overclockers.co.uk is £47.7/TB or £0.048/GB across the 50 live listings we track, with the widest choice of drives priced around £43.4/TB or £0.043/GB. The best deals on Overclockers.co.uk start from about £110 for 2TB (£55/TB), £180 for 6TB (£30/TB) and £280 for 8TB (£35/TB). The current best value is 6TB at roughly £30 per TB.
📊 As of 29 August 2026, the typical HDD on Box.co.uk is £50.9/TB or £0.051/GB across the 75 live listings we track, with the widest choice of drives priced around £43.2/TB or £0.043/GB. The best deals on Box.co.uk start from about £106 for 2TB (£52.8/TB), £247 for 6TB (£41.2/TB) and £321 for 10TB (£32.1/TB). The current best value is 10TB at roughly £32.1 per TB.
📊 As of 29. August 2026, the typical HDD on Amazon.de is 220 €/TB or 0,22 €/GB across the 3,674 live listings we track, with the widest choice of drives priced around 51,4 €/TB or 0,051 €/GB. The best deals on Amazon.de start from about 329 € for 8TB (41,1 €/TB), 365 € for 14TB (26,1 €/TB) and 619 € for 20TB (31 €/TB). The current best value is 14TB at roughly 26,1 € per TB.
📊 As of 29. August 2026, the typical HDD on eBay.de is 88,2 €/TB or 0,088 €/GB across the 16,992 live listings we track, with the widest choice of drives priced around 98,7 €/TB or 0,099 €/GB. The best deals on eBay.de start from about 229 € for 8TB (28,6 €/TB), 332 € for 14TB (23,7 €/TB) and 530 € for 20TB (26,5 €/TB). The current best value is 18TB at roughly 21,7 € per TB.
📊 As of 29. August 2026, the typical HDD on getgoods.de is 66 €/TB or 0,066 €/GB across the 97 live listings we track, with the widest choice of drives priced around 51,6 €/TB or 0,052 €/GB. The best deals on getgoods.de start from about 119 € for 2TB (59,5 €/TB), 179 € for 4TB (44,8 €/TB) and 295 € for 8TB (36,9 €/TB). The current best value is 8TB at roughly 36,9 € per TB.
📊 As of 29. August 2026, the typical HDD on Alternate.de is 57,7 €/TB or 0,058 €/GB across the 138 live listings we track, with the widest choice of drives priced around 42,2 €/TB or 0,042 €/GB. The best deals on Alternate.de start from about 266 € for 8TB (33,3 €/TB), 648 € for 16TB (40,5 €/TB) and 792 € for 20TB (39,6 €/TB). The current best value is 8TB at roughly 33,3 € per TB.
📊 As of 29 August 2026, the typical HDD on eBay.com.au is $170/TB or $0.17/GB across the 4,673 live listings we track, with the widest choice of drives priced around $96.9/TB or $0.097/GB. The best deals on eBay.com.au start from about $544 for 8TB ($68/TB), $682 for 14TB ($48.7/TB) and $1,249 for 20TB ($62.5/TB). The current best value is 14TB at roughly $48.7 per TB.
📊 As of 29 août 2026, the typical HDD on Amazon.fr is 197 €/TB or 0,197 €/GB across the 1,645 live listings we track, with the widest choice of drives priced around 101 €/TB or 0,101 €/GB. The best deals on Amazon.fr start from about 312 € for 8TB (39 €/TB), 525 € for 14TB (37,5 €/TB) and 650 € for 20TB (32,5 €/TB). The current best value is 16TB at roughly 27,5 € per TB.
📊 As of 29 de agosto de 2026, the typical HDD on Amazon.es is 212 €/TB or 0,212 €/GB across the 2,854 live listings we track, with the widest choice of drives priced around 55,1 €/TB or 0,055 €/GB. The best deals on Amazon.es start from about 329 € for 8TB (41,1 €/TB), 518 € for 14TB (37 €/TB) and 587 € for 20TB (29,3 €/TB). The current best value is 16TB at roughly 27,9 € per TB.
📊 As of August 29, 2026, the typical HDD on Amazon.ca is $226/TB or $0.226/GB across the 1,991 live listings we track, with the widest choice of drives priced around $66.7/TB or $0.067/GB. The best deals on Amazon.ca start from about $396 for 8TB ($49.5/TB), $590 for 14TB ($42.1/TB) and $999 for 20TB ($50/TB). The current best value is 16TB at roughly $39.4 per TB.
📊 As of August 29, 2026, the typical HDD on eBay.ca is $433/TB or $0.433/GB across the 1,310 live listings we track, with the widest choice of drives priced around $42.6/TB or $0.043/GB. The best deals on eBay.ca start from about $275 for 8TB ($34.4/TB), $410 for 14TB ($29.3/TB) and $475 for 20TB ($23.7/TB). The current best value is 10TB at roughly $22 per TB.
📊 As of August 29, 2026, the typical HDD on Newegg.ca is $143/TB or $0.143/GB across the 449 live listings we track, with the widest choice of drives priced around $65.9/TB or $0.066/GB. The best deals on Newegg.ca start from about $420 for 8TB ($52.5/TB), $725 for 14TB ($51.8/TB) and $1,042 for 20TB ($52.1/TB). The current best value is 14TB at roughly $51.8 per TB.
📊 As of 29 augustus 2026, the typical HDD on Amazon.nl is € 104/TB or € 0,104/GB across the 1,721 live listings we track, with the widest choice of drives priced around € 50,2/TB or € 0,05/GB. The best deals on Amazon.nl start from about € 270 for 8TB (€ 33,7/TB), € 521 for 14TB (€ 37,2/TB) and € 531 for 20TB (€ 26,5/TB). The current best value is 16TB at roughly € 26,3 per TB.
📊 As of 29 agosto 2026, the typical HDD on Amazon.it is 203 €/TB or 0,203 €/GB across the 3,600 live listings we track, with the widest choice of drives priced around 52,9 €/TB or 0,053 €/GB. The best deals on Amazon.it start from about 326 € for 8TB (40,8 €/TB), 484 € for 14TB (34,6 €/TB) and 595 € for 20TB (29,7 €/TB). The current best value is 18TB at roughly 27,7 € per TB.
📊 As of 29 agosto 2026, the typical HDD on eBay.it is 94,4 €/TB or 0,094 €/GB across the 10,070 live listings we track, with the widest choice of drives priced around 92,6 €/TB or 0,093 €/GB. The best deals on eBay.it start from about 229 € for 8TB (28,6 €/TB), 370 € for 14TB (26,4 €/TB) and 554 € for 20TB (27,7 €/TB). The current best value is 18TB at roughly 19,4 € per TB.
📊 As of 29 augusti 2026, the typical HDD on Amazon.se is 1 394 kr/TB or 1,394 kr/GB across the 911 live listings we track, with the widest choice of drives priced around 736 kr/TB or 0,736 kr/GB. The best deals on Amazon.se start from about 1 000 kr for 2TB (500 kr/TB), 1 453 kr for 4TB (363 kr/TB) and 2 006 kr for 6TB (334 kr/TB). The current best value is 6TB at roughly 334 kr per TB.
📊 As of 29 sierpnia 2026, the typical HDD on Amazon.pl is 544 zł/TB or 0,544 zł/GB across the 1,111 live listings we track, with the widest choice of drives priced around 267 zł/TB or 0,267 zł/GB. The best deals on Amazon.pl start from about 1121 zł for 8TB (140 zł/TB), 172 zł for 10TB (17,2 zł/TB) and 1725 zł for 14TB (123 zł/TB). The current best value is 10TB at roughly 17,2 zł per TB.
Sourced from real discussions on r/DataHoarder and r/selfhosted, cross-checked against live PricePerGig listings.
セルフホスティング勢の永遠のテーマ。クラウドに毎月払い続けるべきか、それとも自分でドライブを買うべきか。
本気でデータを溜め込んでいる人向けに、単刀直入に答えましょう。
長期保存する大容量データなら、ドライブ購入の方が圧倒的に安いです。比較にすらなりません。
上の表にあるあなたのマーケットプレイスのTBあたりライブ価格こそ、この議論に決着をつける数字です。
この計算を見れば議論は終わる
クラウドプロバイダーが計算してほしくない部分がここです。
ハードドライブは一回払いのコストです。TBあたり一度支払えば、あとは何年も所有し続けられます。
一方クラウドストレージはTBあたり同程度の金額を、しかも毎月、永遠に請求してきます。
つまりドライブがTBあたり一定額の一回払い、クラウドが毎月その一部を請求するなら、驚くほど早く損益分岐点に達します。多くの場合1年以内です。それ以降、ドライブは実質タダのストレージになる一方で、クラウドの請求書は届き続けます。
上のライブ価格を見て、その一部を毎月払い続ける場合を想像してみてください。それがクラウドの取引条件です。
クラウドが本当に有利になる場面
私はクラウドのアンチではないので、公平に見ていきましょう。クラウドには本物の強みがあります。
クラウドが正解になるのは、以下を求める場合です。
- データ量が少なく、月額コストが誤差レベルで済む場合。
- どのデバイスからでも簡単に共有・アクセスしたい場合。
- ハードウェアを一切運用せず、自動でオフサイトバックアップしたい場合。
- 初期費用ゼロ、メンテナンスの手間もゼロにしたい場合。
スマホの写真や数点の書類程度なら、クラウドは優秀で、コストも無視できるレベルです。この規模なら利便性が確実に元を取ります。
ドライブ所有が圧倒的に有利になる場面
データ量が増え始めた瞬間、この計算は一気に逆転します。
メディアファイル、バックアップ、アーカイブ、増え続けるコレクション。ここでクラウドの月額料金は積み重なって本当のお金になり、ドライブ所有が大きな節約につながります。
データホーダーがドライブを買うのは、それが趣味だからではありません。50TBをクラウドに毎月保存する料金が目を疑うほど高いからです。
大容量分を自分で所有すれば、購入したその日からコストは止まります。
賢いハイブリッド戦略
どちらか一方を選ぶ必要はありません。最良の構成は両方を使うことです。
- 大容量分は上のライブ表で最安のTB単価のドライブを自分で所有する。
- 自宅で冗長化を組んで、1台壊れても大騒ぎしない体制にする。
- 本当にかけがえのないデータだけ、少量のクラウドをオフサイトバックアップとして使う。
これで安価な大容量ストレージとオフサイトの安全網の両方が手に入り、全TB分を毎月払う必要はなくなります。
結論
クラウドストレージが安いのは、少量データ、共有、常時同期が必要な場合に限られます。長期保存する大容量データなら、自分でドライブを買う方が圧倒的に有利で、サブスクリプションを払っていない月ごとにその差はさらに広がります。
上のTBあたりライブ価格を確認し、簡単な損益分岐計算をして、大容量データは自分で所有しましょう。安全のためのクラウドは少しだけ残しておけば、財布を圧迫し続ける永遠の請求書なしに、両方のいいとこ取りができます。
